20921879320

素因数分解:

$2^3\times 5^1\times {\mathrm{53}}^1\times {\mathrm{101}}^1\times {\mathrm{97711}}^1$

素因数の和:97876

約数の個数: 64

約数和(自身を含む): 48437792640

約数和(自身を除く): 27515913320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 53, 101, 106, 202, 212, 265, 404, 424, 505, 530, 808, 1010, 1060, 2020, 2120, 4040, 5353, 10706, 21412, 26765, 42824, 53530, 97711, 107060, 195422, 214120, 390844, 488555, 781688, 977110, 1954220, 3908440, 5178683, 9868811, 10357366, 19737622, 20714732, 25893415, 39475244, 41429464, 49344055, 51786830, 78950488, 98688110, 103573660, 197376220, 207147320, 394752440, 523046983, 1046093966, 2092187932, 2615234915, 4184375864, 5230469830, 10460939660, 20921879320]

約数ペア:

[(1, 20921879320), (2, 10460939660), (4, 5230469830), (5, 4184375864), (8, 2615234915), (10, 2092187932), (20, 1046093966), (40, 523046983), (53, 394752440), (101, 207147320), (106, 197376220), (202, 103573660), (212, 98688110), (265, 78950488), (404, 51786830), (424, 49344055), (505, 41429464), (530, 39475244), (808, 25893415), (1010, 20714732), (1060, 19737622), (2020, 10357366), (2120, 9868811), (4040, 5178683), (5353, 3908440), (10706, 1954220), (21412, 977110), (26765, 781688), (42824, 488555), (53530, 390844), (97711, 214120), (107060, 195422)]