20198720

素因数分解:

$2^6\times 5^1\times {\mathrm{17}}^1\times {\mathrm{47}}^1\times {\mathrm{79}}^1$

素因数の和:160

約数の個数: 112

約数和(自身を含む): 52669440

約数和(自身を除く): 32470720

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 47, 64, 68, 79, 80, 85, 94, 136, 158, 160, 170, 188, 235, 272, 316, 320, 340, 376, 395, 470, 544, 632, 680, 752, 790, 799, 940, 1088, 1264, 1343, 1360, 1504, 1580, 1598, 1880, 2528, 2686, 2720, 3008, 3160, 3196, 3713, 3760, 3995, 5056, 5372, 5440, 6320, 6392, 6715, 7426, 7520, 7990, 10744, 12640, 12784, 13430, 14852, 15040, 15980, 18565, 21488, 25280, 25568, 26860, 29704, 31960, 37130, 42976, 51136, 53720, 59408, 63121, 63920, 74260, 85952, 107440, 118816, 126242, 127840, 148520, 214880, 237632, 252484, 255680, 297040, 315605, 429760, 504968, 594080, 631210, 1009936, 1188160, 1262420, 2019872, 2524840, 4039744, 5049680, 10099360, 20198720]

約数ペア:

[(1, 20198720), (2, 10099360), (4, 5049680), (5, 4039744), (8, 2524840), (10, 2019872), (16, 1262420), (17, 1188160), (20, 1009936), (32, 631210), (34, 594080), (40, 504968), (47, 429760), (64, 315605), (68, 297040), (79, 255680), (80, 252484), (85, 237632), (94, 214880), (136, 148520), (158, 127840), (160, 126242), (170, 118816), (188, 107440), (235, 85952), (272, 74260), (316, 63920), (320, 63121), (340, 59408), (376, 53720), (395, 51136), (470, 42976), (544, 37130), (632, 31960), (680, 29704), (752, 26860), (790, 25568), (799, 25280), (940, 21488), (1088, 18565), (1264, 15980), (1343, 15040), (1360, 14852), (1504, 13430), (1580, 12784), (1598, 12640), (1880, 10744), (2528, 7990), (2686, 7520), (2720, 7426), (3008, 6715), (3160, 6392), (3196, 6320), (3713, 5440), (3760, 5372), (3995, 5056)]