840580

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{61}}^1$

素因数の和:136

約数の個数: 48

約数和(自身を含む): 1968624

約数和(自身を除く): 1128044

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 53, 61, 65, 106, 122, 130, 212, 244, 260, 265, 305, 530, 610, 689, 793, 1060, 1220, 1378, 1586, 2756, 3172, 3233, 3445, 3965, 6466, 6890, 7930, 12932, 13780, 15860, 16165, 32330, 42029, 64660, 84058, 168116, 210145, 420290, 840580]

約数ペア:

[(1, 840580), (2, 420290), (4, 210145), (5, 168116), (10, 84058), (13, 64660), (20, 42029), (26, 32330), (52, 16165), (53, 15860), (61, 13780), (65, 12932), (106, 7930), (122, 6890), (130, 6466), (212, 3965), (244, 3445), (260, 3233), (265, 3172), (305, 2756), (530, 1586), (610, 1378), (689, 1220), (793, 1060)]