81919880

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{307}}^1\times {\mathrm{953}}^1$

素因数の和:1278

約数の個数: 64

約数和(自身を含む): 211559040

約数和(自身を除く): 129639160

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 307, 614, 953, 1228, 1535, 1906, 2149, 2456, 3070, 3812, 4298, 4765, 6140, 6671, 7624, 8596, 9530, 10745, 12280, 13342, 17192, 19060, 21490, 26684, 33355, 38120, 42980, 53368, 66710, 85960, 133420, 266840, 292571, 585142, 1170284, 1462855, 2047997, 2340568, 2925710, 4095994, 5851420, 8191988, 10239985, 11702840, 16383976, 20479970, 40959940, 81919880]

約数ペア:

[(1, 81919880), (2, 40959940), (4, 20479970), (5, 16383976), (7, 11702840), (8, 10239985), (10, 8191988), (14, 5851420), (20, 4095994), (28, 2925710), (35, 2340568), (40, 2047997), (56, 1462855), (70, 1170284), (140, 585142), (280, 292571), (307, 266840), (614, 133420), (953, 85960), (1228, 66710), (1535, 53368), (1906, 42980), (2149, 38120), (2456, 33355), (3070, 26684), (3812, 21490), (4298, 19060), (4765, 17192), (6140, 13342), (6671, 12280), (7624, 10745), (8596, 9530)]