20731656225

素因数分解:

$3^1\times 5^2\times 7^2\times {\mathrm{53}}^1\times {\mathrm{163}}^1\times {\mathrm{653}}^1$

素因数の和:896

約数の個数: 144

約数和(自身を含む): 40936612032

約数和(自身を除く): 20204955807

約数列:

[1, 3, 5, 7, 15, 21, 25, 35, 49, 53, 75, 105, 147, 159, 163, 175, 245, 265, 371, 489, 525, 653, 735, 795, 815, 1113, 1141, 1225, 1325, 1855, 1959, 2445, 2597, 3265, 3423, 3675, 3975, 4075, 4571, 5565, 5705, 7791, 7987, 8639, 9275, 9795, 12225, 12985, 13713, 16325, 17115, 22855, 23961, 25917, 27825, 28525, 31997, 34609, 38955, 39935, 43195, 48975, 60473, 64925, 68565, 85575, 95991, 103827, 106439, 114275, 119805, 129585, 159985, 173045, 181419, 194775, 199675, 215975, 242263, 302365, 319317, 342825, 423311, 479955, 519135, 532195, 599025, 647925, 726789, 745073, 799925, 865225, 907095, 1211315, 1269933, 1511825, 1596585, 1695841, 2116555, 2235219, 2399775, 2595675, 2660975, 3633945, 3725365, 4535475, 5087523, 5215511, 5641267, 6056575, 6349665, 7982925, 8479205, 10582775, 11176095, 15646533, 16923801, 18169725, 18626825, 25437615, 26077555, 28206335, 31748325, 39488869, 42396025, 55880475, 78232665, 84619005, 118466607, 127188075, 130387775, 141031675, 197444345, 276422083, 391163325, 423095025, 592333035, 829266249, 987221725, 1382110415, 2961665175, 4146331245, 6910552075, 20731656225]

約数ペア:

[(1, 20731656225), (3, 6910552075), (5, 4146331245), (7, 2961665175), (15, 1382110415), (21, 987221725), (25, 829266249), (35, 592333035), (49, 423095025), (53, 391163325), (75, 276422083), (105, 197444345), (147, 141031675), (159, 130387775), (163, 127188075), (175, 118466607), (245, 84619005), (265, 78232665), (371, 55880475), (489, 42396025), (525, 39488869), (653, 31748325), (735, 28206335), (795, 26077555), (815, 25437615), (1113, 18626825), (1141, 18169725), (1225, 16923801), (1325, 15646533), (1855, 11176095), (1959, 10582775), (2445, 8479205), (2597, 7982925), (3265, 6349665), (3423, 6056575), (3675, 5641267), (3975, 5215511), (4075, 5087523), (4571, 4535475), (5565, 3725365), (5705, 3633945), (7791, 2660975), (7987, 2595675), (8639, 2399775), (9275, 2235219), (9795, 2116555), (12225, 1695841), (12985, 1596585), (13713, 1511825), (16325, 1269933), (17115, 1211315), (22855, 907095), (23961, 865225), (25917, 799925), (27825, 745073), (28525, 726789), (31997, 647925), (34609, 599025), (38955, 532195), (39935, 519135), (43195, 479955), (48975, 423311), (60473, 342825), (64925, 319317), (68565, 302365), (85575, 242263), (95991, 215975), (103827, 199675), (106439, 194775), (114275, 181419), (119805, 173045), (129585, 159985)]