90781640

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{179}}^1\times {\mathrm{409}}^1$

素因数の和:630

約数の個数: 64

約数和(自身を含む): 212544000

約数和(自身を除く): 121762360

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 179, 248, 310, 358, 409, 620, 716, 818, 895, 1240, 1432, 1636, 1790, 2045, 3272, 3580, 4090, 5549, 7160, 8180, 11098, 12679, 16360, 22196, 25358, 27745, 44392, 50716, 55490, 63395, 73211, 101432, 110980, 126790, 146422, 221960, 253580, 292844, 366055, 507160, 585688, 732110, 1464220, 2269541, 2928440, 4539082, 9078164, 11347705, 18156328, 22695410, 45390820, 90781640]

約数ペア:

[(1, 90781640), (2, 45390820), (4, 22695410), (5, 18156328), (8, 11347705), (10, 9078164), (20, 4539082), (31, 2928440), (40, 2269541), (62, 1464220), (124, 732110), (155, 585688), (179, 507160), (248, 366055), (310, 292844), (358, 253580), (409, 221960), (620, 146422), (716, 126790), (818, 110980), (895, 101432), (1240, 73211), (1432, 63395), (1636, 55490), (1790, 50716), (2045, 44392), (3272, 27745), (3580, 25358), (4090, 22196), (5549, 16360), (7160, 12679), (8180, 11098)]