1813980

素因数分解:

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

素因数の和:643

約数の個数: 72

約数和(自身を含む): 5917968

約数和(自身を除く): 4103988

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 49, 60, 70, 84, 98, 105, 140, 147, 196, 210, 245, 294, 420, 490, 588, 617, 735, 980, 1234, 1470, 1851, 2468, 2940, 3085, 3702, 4319, 6170, 7404, 8638, 9255, 12340, 12957, 17276, 18510, 21595, 25914, 30233, 37020, 43190, 51828, 60466, 64785, 86380, 90699, 120932, 129570, 151165, 181398, 259140, 302330, 362796, 453495, 604660, 906990, 1813980]

約数ペア:

[(1, 1813980), (2, 906990), (3, 604660), (4, 453495), (5, 362796), (6, 302330), (7, 259140), (10, 181398), (12, 151165), (14, 129570), (15, 120932), (20, 90699), (21, 86380), (28, 64785), (30, 60466), (35, 51828), (42, 43190), (49, 37020), (60, 30233), (70, 25914), (84, 21595), (98, 18510), (105, 17276), (140, 12957), (147, 12340), (196, 9255), (210, 8638), (245, 7404), (294, 6170), (420, 4319), (490, 3702), (588, 3085), (617, 2940), (735, 2468), (980, 1851), (1234, 1470)]