20319760

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{67}}^1\times {\mathrm{223}}^1$

素因数の和:320

約数の個数: 80

約数和(自身を含む): 50996736

約数和(自身を除く): 30676976

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 67, 68, 80, 85, 134, 136, 170, 223, 268, 272, 335, 340, 446, 536, 670, 680, 892, 1072, 1115, 1139, 1340, 1360, 1784, 2230, 2278, 2680, 3568, 3791, 4460, 4556, 5360, 5695, 7582, 8920, 9112, 11390, 14941, 15164, 17840, 18224, 18955, 22780, 29882, 30328, 37910, 45560, 59764, 60656, 74705, 75820, 91120, 119528, 149410, 151640, 239056, 253997, 298820, 303280, 507994, 597640, 1015988, 1195280, 1269985, 2031976, 2539970, 4063952, 5079940, 10159880, 20319760]

約数ペア:

[(1, 20319760), (2, 10159880), (4, 5079940), (5, 4063952), (8, 2539970), (10, 2031976), (16, 1269985), (17, 1195280), (20, 1015988), (34, 597640), (40, 507994), (67, 303280), (68, 298820), (80, 253997), (85, 239056), (134, 151640), (136, 149410), (170, 119528), (223, 91120), (268, 75820), (272, 74705), (335, 60656), (340, 59764), (446, 45560), (536, 37910), (670, 30328), (680, 29882), (892, 22780), (1072, 18955), (1115, 18224), (1139, 17840), (1340, 15164), (1360, 14941), (1784, 11390), (2230, 9112), (2278, 8920), (2680, 7582), (3568, 5695), (3791, 5360), (4460, 4556)]