20816500

素因数分解:

$2^2\times 5^3\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{79}}^1$

素因数の和:146

約数の個数: 96

約数和(自身を含む): 50319360

約数和(自身を除く): 29502860

約数列:

[1, 2, 4, 5, 10, 17, 20, 25, 31, 34, 50, 62, 68, 79, 85, 100, 124, 125, 155, 158, 170, 250, 310, 316, 340, 395, 425, 500, 527, 620, 775, 790, 850, 1054, 1343, 1550, 1580, 1700, 1975, 2108, 2125, 2449, 2635, 2686, 3100, 3875, 3950, 4250, 4898, 5270, 5372, 6715, 7750, 7900, 8500, 9796, 9875, 10540, 12245, 13175, 13430, 15500, 19750, 24490, 26350, 26860, 33575, 39500, 41633, 48980, 52700, 61225, 65875, 67150, 83266, 122450, 131750, 134300, 166532, 167875, 208165, 244900, 263500, 306125, 335750, 416330, 612250, 671500, 832660, 1040825, 1224500, 2081650, 4163300, 5204125, 10408250, 20816500]

約数ペア:

[(1, 20816500), (2, 10408250), (4, 5204125), (5, 4163300), (10, 2081650), (17, 1224500), (20, 1040825), (25, 832660), (31, 671500), (34, 612250), (50, 416330), (62, 335750), (68, 306125), (79, 263500), (85, 244900), (100, 208165), (124, 167875), (125, 166532), (155, 134300), (158, 131750), (170, 122450), (250, 83266), (310, 67150), (316, 65875), (340, 61225), (395, 52700), (425, 48980), (500, 41633), (527, 39500), (620, 33575), (775, 26860), (790, 26350), (850, 24490), (1054, 19750), (1343, 15500), (1550, 13430), (1580, 13175), (1700, 12245), (1975, 10540), (2108, 9875), (2125, 9796), (2449, 8500), (2635, 7900), (2686, 7750), (3100, 6715), (3875, 5372), (3950, 5270), (4250, 4898)]