641940

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{823}}^1$

素因数の和:848

約数の個数: 48

約数和(自身を含む): 1938048

約数和(自身を除く): 1296108

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 195, 260, 390, 780, 823, 1646, 2469, 3292, 4115, 4938, 8230, 9876, 10699, 12345, 16460, 21398, 24690, 32097, 42796, 49380, 53495, 64194, 106990, 128388, 160485, 213980, 320970, 641940]

約数ペア:

[(1, 641940), (2, 320970), (3, 213980), (4, 160485), (5, 128388), (6, 106990), (10, 64194), (12, 53495), (13, 49380), (15, 42796), (20, 32097), (26, 24690), (30, 21398), (39, 16460), (52, 12345), (60, 10699), (65, 9876), (78, 8230), (130, 4938), (156, 4115), (195, 3292), (260, 2469), (390, 1646), (780, 823)]