81301840

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{32783}}^1$

素因数の和:32827

約数の個数: 40

約数和(自身を含む): 195130368

約数和(自身を除く): 113828528

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 248, 310, 496, 620, 1240, 2480, 32783, 65566, 131132, 163915, 262264, 327830, 524528, 655660, 1016273, 1311320, 2032546, 2622640, 4065092, 5081365, 8130184, 10162730, 16260368, 20325460, 40650920, 81301840]

約数ペア:

[(1, 81301840), (2, 40650920), (4, 20325460), (5, 16260368), (8, 10162730), (10, 8130184), (16, 5081365), (20, 4065092), (31, 2622640), (40, 2032546), (62, 1311320), (80, 1016273), (124, 655660), (155, 524528), (248, 327830), (310, 262264), (496, 163915), (620, 131132), (1240, 65566), (2480, 32783)]