78909880

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{9091}}^1$

素因数の和:9140

約数の個数: 64

約数和(自身を含む): 209479680

約数和(自身を除く): 130569800

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 31, 35, 40, 56, 62, 70, 124, 140, 155, 217, 248, 280, 310, 434, 620, 868, 1085, 1240, 1736, 2170, 4340, 8680, 9091, 18182, 36364, 45455, 63637, 72728, 90910, 127274, 181820, 254548, 281821, 318185, 363640, 509096, 563642, 636370, 1127284, 1272740, 1409105, 1972747, 2254568, 2545480, 2818210, 3945494, 5636420, 7890988, 9863735, 11272840, 15781976, 19727470, 39454940, 78909880]

約数ペア:

[(1, 78909880), (2, 39454940), (4, 19727470), (5, 15781976), (7, 11272840), (8, 9863735), (10, 7890988), (14, 5636420), (20, 3945494), (28, 2818210), (31, 2545480), (35, 2254568), (40, 1972747), (56, 1409105), (62, 1272740), (70, 1127284), (124, 636370), (140, 563642), (155, 509096), (217, 363640), (248, 318185), (280, 281821), (310, 254548), (434, 181820), (620, 127274), (868, 90910), (1085, 72728), (1240, 63637), (1736, 45455), (2170, 36364), (4340, 18182), (8680, 9091)]