20491310

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1$

素因数の和:142

約数の個数: 96

約数和(自身を含む): 47278080

約数和(自身を除く): 26786770

約数列:

[1, 2, 5, 7, 10, 14, 19, 31, 35, 38, 49, 62, 70, 71, 95, 98, 133, 142, 155, 190, 217, 245, 266, 310, 355, 434, 490, 497, 589, 665, 710, 931, 994, 1085, 1178, 1330, 1349, 1519, 1862, 2170, 2201, 2485, 2698, 2945, 3038, 3479, 4123, 4402, 4655, 4970, 5890, 6745, 6958, 7595, 8246, 9310, 9443, 11005, 13490, 15190, 15407, 17395, 18886, 20615, 22010, 28861, 30814, 34790, 41230, 41819, 47215, 57722, 66101, 77035, 83638, 94430, 107849, 132202, 144305, 154070, 209095, 215698, 288610, 292733, 330505, 418190, 539245, 585466, 661010, 1078490, 1463665, 2049131, 2927330, 4098262, 10245655, 20491310]

約数ペア:

[(1, 20491310), (2, 10245655), (5, 4098262), (7, 2927330), (10, 2049131), (14, 1463665), (19, 1078490), (31, 661010), (35, 585466), (38, 539245), (49, 418190), (62, 330505), (70, 292733), (71, 288610), (95, 215698), (98, 209095), (133, 154070), (142, 144305), (155, 132202), (190, 107849), (217, 94430), (245, 83638), (266, 77035), (310, 66101), (355, 57722), (434, 47215), (490, 41819), (497, 41230), (589, 34790), (665, 30814), (710, 28861), (931, 22010), (994, 20615), (1085, 18886), (1178, 17395), (1330, 15407), (1349, 15190), (1519, 13490), (1862, 11005), (2170, 9443), (2201, 9310), (2485, 8246), (2698, 7595), (2945, 6958), (3038, 6745), (3479, 5890), (4123, 4970), (4402, 4655)]