18830840

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{109}}^1\times {\mathrm{617}}^1$

素因数の和:744

約数の個数: 64

約数和(自身を含む): 48945600

約数和(自身を除く): 30114760

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 109, 140, 218, 280, 436, 545, 617, 763, 872, 1090, 1234, 1526, 2180, 2468, 3052, 3085, 3815, 4319, 4360, 4936, 6104, 6170, 7630, 8638, 12340, 15260, 17276, 21595, 24680, 30520, 34552, 43190, 67253, 86380, 134506, 172760, 269012, 336265, 470771, 538024, 672530, 941542, 1345060, 1883084, 2353855, 2690120, 3766168, 4707710, 9415420, 18830840]

約数ペア:

[(1, 18830840), (2, 9415420), (4, 4707710), (5, 3766168), (7, 2690120), (8, 2353855), (10, 1883084), (14, 1345060), (20, 941542), (28, 672530), (35, 538024), (40, 470771), (56, 336265), (70, 269012), (109, 172760), (140, 134506), (218, 86380), (280, 67253), (436, 43190), (545, 34552), (617, 30520), (763, 24680), (872, 21595), (1090, 17276), (1234, 15260), (1526, 12340), (2180, 8638), (2468, 7630), (3052, 6170), (3085, 6104), (3815, 4936), (4319, 4360)]