18828940

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{139}}^1\times {\mathrm{521}}^1$

素因数の和:682

約数の個数: 48

約数和(自身を含む): 42971040

約数和(自身を除く): 24142100

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 139, 260, 278, 521, 556, 695, 1042, 1390, 1807, 2084, 2605, 2780, 3614, 5210, 6773, 7228, 9035, 10420, 13546, 18070, 27092, 33865, 36140, 67730, 72419, 135460, 144838, 289676, 362095, 724190, 941447, 1448380, 1882894, 3765788, 4707235, 9414470, 18828940]

約数ペア:

[(1, 18828940), (2, 9414470), (4, 4707235), (5, 3765788), (10, 1882894), (13, 1448380), (20, 941447), (26, 724190), (52, 362095), (65, 289676), (130, 144838), (139, 135460), (260, 72419), (278, 67730), (521, 36140), (556, 33865), (695, 27092), (1042, 18070), (1390, 13546), (1807, 10420), (2084, 9035), (2605, 7228), (2780, 6773), (3614, 5210)]