18628520

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{83}}^1\times {\mathrm{181}}^1$

素因数の和:306

約数の個数: 64

約数和(自身を含む): 44029440

約数和(自身を除く): 25400920

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 83, 124, 155, 166, 181, 248, 310, 332, 362, 415, 620, 664, 724, 830, 905, 1240, 1448, 1660, 1810, 2573, 3320, 3620, 5146, 5611, 7240, 10292, 11222, 12865, 15023, 20584, 22444, 25730, 28055, 30046, 44888, 51460, 56110, 60092, 75115, 102920, 112220, 120184, 150230, 224440, 300460, 465713, 600920, 931426, 1862852, 2328565, 3725704, 4657130, 9314260, 18628520]

約数ペア:

[(1, 18628520), (2, 9314260), (4, 4657130), (5, 3725704), (8, 2328565), (10, 1862852), (20, 931426), (31, 600920), (40, 465713), (62, 300460), (83, 224440), (124, 150230), (155, 120184), (166, 112220), (181, 102920), (248, 75115), (310, 60092), (332, 56110), (362, 51460), (415, 44888), (620, 30046), (664, 28055), (724, 25730), (830, 22444), (905, 20584), (1240, 15023), (1448, 12865), (1660, 11222), (1810, 10292), (2573, 7240), (3320, 5611), (3620, 5146)]