2780380

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{53}}^1\times {\mathrm{61}}^1$

素因数の和:166

約数の個数: 48

約数和(自身を含む): 6187104

約数和(自身を除く): 3406724

約数列:

[1, 2, 4, 5, 10, 20, 43, 53, 61, 86, 106, 122, 172, 212, 215, 244, 265, 305, 430, 530, 610, 860, 1060, 1220, 2279, 2623, 3233, 4558, 5246, 6466, 9116, 10492, 11395, 12932, 13115, 16165, 22790, 26230, 32330, 45580, 52460, 64660, 139019, 278038, 556076, 695095, 1390190, 2780380]

約数ペア:

[(1, 2780380), (2, 1390190), (4, 695095), (5, 556076), (10, 278038), (20, 139019), (43, 64660), (53, 52460), (61, 45580), (86, 32330), (106, 26230), (122, 22790), (172, 16165), (212, 13115), (215, 12932), (244, 11395), (265, 10492), (305, 9116), (430, 6466), (530, 5246), (610, 4558), (860, 3233), (1060, 2623), (1220, 2279)]