19953960

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{12791}}^1$

素因数の和:12818

約数の個数: 64

約数和(自身を含む): 64471680

約数和(自身を除く): 44517720

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 20, 24, 26, 30, 39, 40, 52, 60, 65, 78, 104, 120, 130, 156, 195, 260, 312, 390, 520, 780, 1560, 12791, 25582, 38373, 51164, 63955, 76746, 102328, 127910, 153492, 166283, 191865, 255820, 306984, 332566, 383730, 498849, 511640, 665132, 767460, 831415, 997698, 1330264, 1534920, 1662830, 1995396, 2494245, 3325660, 3990792, 4988490, 6651320, 9976980, 19953960]

約数ペア:

[(1, 19953960), (2, 9976980), (3, 6651320), (4, 4988490), (5, 3990792), (6, 3325660), (8, 2494245), (10, 1995396), (12, 1662830), (13, 1534920), (15, 1330264), (20, 997698), (24, 831415), (26, 767460), (30, 665132), (39, 511640), (40, 498849), (52, 383730), (60, 332566), (65, 306984), (78, 255820), (104, 191865), (120, 166283), (130, 153492), (156, 127910), (195, 102328), (260, 76746), (312, 63955), (390, 51164), (520, 38373), (780, 25582), (1560, 12791)]