21214040

素因数分解:

$2^3\times 5^1\times {\mathrm{59}}^1\times {\mathrm{89}}^1\times {\mathrm{101}}^1$

素因数の和:260

約数の個数: 64

約数和(自身を含む): 49572000

約数和(自身を除く): 28357960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 59, 89, 101, 118, 178, 202, 236, 295, 356, 404, 445, 472, 505, 590, 712, 808, 890, 1010, 1180, 1780, 2020, 2360, 3560, 4040, 5251, 5959, 8989, 10502, 11918, 17978, 21004, 23836, 26255, 29795, 35956, 42008, 44945, 47672, 52510, 59590, 71912, 89890, 105020, 119180, 179780, 210040, 238360, 359560, 530351, 1060702, 2121404, 2651755, 4242808, 5303510, 10607020, 21214040]

約数ペア:

[(1, 21214040), (2, 10607020), (4, 5303510), (5, 4242808), (8, 2651755), (10, 2121404), (20, 1060702), (40, 530351), (59, 359560), (89, 238360), (101, 210040), (118, 179780), (178, 119180), (202, 105020), (236, 89890), (295, 71912), (356, 59590), (404, 52510), (445, 47672), (472, 44945), (505, 42008), (590, 35956), (712, 29795), (808, 26255), (890, 23836), (1010, 21004), (1180, 17978), (1780, 11918), (2020, 10502), (2360, 8989), (3560, 5959), (4040, 5251)]