18212500

素因数分解:

$2^2\times 5^5\times {\mathrm{31}}^1\times {\mathrm{47}}^1$

素因数の和:107

約数の個数: 72

約数和(自身を含む): 41997312

約数和(自身を除く): 23784812

約数列:

[1, 2, 4, 5, 10, 20, 25, 31, 47, 50, 62, 94, 100, 124, 125, 155, 188, 235, 250, 310, 470, 500, 620, 625, 775, 940, 1175, 1250, 1457, 1550, 2350, 2500, 2914, 3100, 3125, 3875, 4700, 5828, 5875, 6250, 7285, 7750, 11750, 12500, 14570, 15500, 19375, 23500, 29140, 29375, 36425, 38750, 58750, 72850, 77500, 96875, 117500, 145700, 146875, 182125, 193750, 293750, 364250, 387500, 587500, 728500, 910625, 1821250, 3642500, 4553125, 9106250, 18212500]

約数ペア:

[(1, 18212500), (2, 9106250), (4, 4553125), (5, 3642500), (10, 1821250), (20, 910625), (25, 728500), (31, 587500), (47, 387500), (50, 364250), (62, 293750), (94, 193750), (100, 182125), (124, 146875), (125, 145700), (155, 117500), (188, 96875), (235, 77500), (250, 72850), (310, 58750), (470, 38750), (500, 36425), (620, 29375), (625, 29140), (775, 23500), (940, 19375), (1175, 15500), (1250, 14570), (1457, 12500), (1550, 11750), (2350, 7750), (2500, 7285), (2914, 6250), (3100, 5875), (3125, 5828), (3875, 4700)]