21327500

素因数分解:

$2^2\times 5^4\times {\mathrm{19}}^1\times {\mathrm{449}}^1$

素因数の和:492

約数の個数: 60

約数和(自身を含む): 49203000

約数和(自身を除く): 27875500

約数列:

[1, 2, 4, 5, 10, 19, 20, 25, 38, 50, 76, 95, 100, 125, 190, 250, 380, 449, 475, 500, 625, 898, 950, 1250, 1796, 1900, 2245, 2375, 2500, 4490, 4750, 8531, 8980, 9500, 11225, 11875, 17062, 22450, 23750, 34124, 42655, 44900, 47500, 56125, 85310, 112250, 170620, 213275, 224500, 280625, 426550, 561250, 853100, 1066375, 1122500, 2132750, 4265500, 5331875, 10663750, 21327500]

約数ペア:

[(1, 21327500), (2, 10663750), (4, 5331875), (5, 4265500), (10, 2132750), (19, 1122500), (20, 1066375), (25, 853100), (38, 561250), (50, 426550), (76, 280625), (95, 224500), (100, 213275), (125, 170620), (190, 112250), (250, 85310), (380, 56125), (449, 47500), (475, 44900), (500, 42655), (625, 34124), (898, 23750), (950, 22450), (1250, 17062), (1796, 11875), (1900, 11225), (2245, 9500), (2375, 8980), (2500, 8531), (4490, 4750)]