1781260

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{17}}^1\times {\mathrm{31}}^1$

素因数の和:83

約数の個数: 72

約数和(自身を含む): 4427136

約数和(自身を除く): 2645876

約数列:

[1, 2, 4, 5, 10, 13, 17, 20, 26, 31, 34, 52, 62, 65, 68, 85, 124, 130, 155, 169, 170, 221, 260, 310, 338, 340, 403, 442, 527, 620, 676, 806, 845, 884, 1054, 1105, 1612, 1690, 2015, 2108, 2210, 2635, 2873, 3380, 4030, 4420, 5239, 5270, 5746, 6851, 8060, 10478, 10540, 11492, 13702, 14365, 20956, 26195, 27404, 28730, 34255, 52390, 57460, 68510, 89063, 104780, 137020, 178126, 356252, 445315, 890630, 1781260]

約数ペア:

[(1, 1781260), (2, 890630), (4, 445315), (5, 356252), (10, 178126), (13, 137020), (17, 104780), (20, 89063), (26, 68510), (31, 57460), (34, 52390), (52, 34255), (62, 28730), (65, 27404), (68, 26195), (85, 20956), (124, 14365), (130, 13702), (155, 11492), (169, 10540), (170, 10478), (221, 8060), (260, 6851), (310, 5746), (338, 5270), (340, 5239), (403, 4420), (442, 4030), (527, 3380), (620, 2873), (676, 2635), (806, 2210), (845, 2108), (884, 2015), (1054, 1690), (1105, 1612)]