20410400

素因数分解:

$2^5\times 5^2\times {\mathrm{31}}^1\times {\mathrm{823}}^1$

素因数の和:874

約数の個数: 72

約数和(自身を含む): 51496704

約数和(自身を除く): 31086304

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 31, 32, 40, 50, 62, 80, 100, 124, 155, 160, 200, 248, 310, 400, 496, 620, 775, 800, 823, 992, 1240, 1550, 1646, 2480, 3100, 3292, 4115, 4960, 6200, 6584, 8230, 12400, 13168, 16460, 20575, 24800, 25513, 26336, 32920, 41150, 51026, 65840, 82300, 102052, 127565, 131680, 164600, 204104, 255130, 329200, 408208, 510260, 637825, 658400, 816416, 1020520, 1275650, 2041040, 2551300, 4082080, 5102600, 10205200, 20410400]

約数ペア:

[(1, 20410400), (2, 10205200), (4, 5102600), (5, 4082080), (8, 2551300), (10, 2041040), (16, 1275650), (20, 1020520), (25, 816416), (31, 658400), (32, 637825), (40, 510260), (50, 408208), (62, 329200), (80, 255130), (100, 204104), (124, 164600), (155, 131680), (160, 127565), (200, 102052), (248, 82300), (310, 65840), (400, 51026), (496, 41150), (620, 32920), (775, 26336), (800, 25513), (823, 24800), (992, 20575), (1240, 16460), (1550, 13168), (1646, 12400), (2480, 8230), (3100, 6584), (3292, 6200), (4115, 4960)]