900000040

素因数分解:

$2^3\times 5^1\times {\mathrm{89}}^1\times {\mathrm{241}}^1\times {\mathrm{1049}}^1$

素因数の和:1390

約数の個数: 64

約数和(自身を含む): 2058210000

約数和(自身を除く): 1158209960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 89, 178, 241, 356, 445, 482, 712, 890, 964, 1049, 1205, 1780, 1928, 2098, 2410, 3560, 4196, 4820, 5245, 8392, 9640, 10490, 20980, 21449, 41960, 42898, 85796, 93361, 107245, 171592, 186722, 214490, 252809, 373444, 428980, 466805, 505618, 746888, 857960, 933610, 1011236, 1264045, 1867220, 2022472, 2528090, 3734440, 5056180, 10112360, 22500001, 45000002, 90000004, 112500005, 180000008, 225000010, 450000020, 900000040]

約数ペア:

[(1, 900000040), (2, 450000020), (4, 225000010), (5, 180000008), (8, 112500005), (10, 90000004), (20, 45000002), (40, 22500001), (89, 10112360), (178, 5056180), (241, 3734440), (356, 2528090), (445, 2022472), (482, 1867220), (712, 1264045), (890, 1011236), (964, 933610), (1049, 857960), (1205, 746888), (1780, 505618), (1928, 466805), (2098, 428980), (2410, 373444), (3560, 252809), (4196, 214490), (4820, 186722), (5245, 171592), (8392, 107245), (9640, 93361), (10490, 85796), (20980, 42898), (21449, 41960)]