21011250

素因数分解:

$2^1\times 3^1\times 5^4\times {\mathrm{13}}^1\times {\mathrm{431}}^1$

素因数の和:469

約数の個数: 80

約数和(自身を含む): 56681856

約数和(自身を除く): 35670606

約数列:

[1, 2, 3, 5, 6, 10, 13, 15, 25, 26, 30, 39, 50, 65, 75, 78, 125, 130, 150, 195, 250, 325, 375, 390, 431, 625, 650, 750, 862, 975, 1250, 1293, 1625, 1875, 1950, 2155, 2586, 3250, 3750, 4310, 4875, 5603, 6465, 8125, 9750, 10775, 11206, 12930, 16250, 16809, 21550, 24375, 28015, 32325, 33618, 48750, 53875, 56030, 64650, 84045, 107750, 140075, 161625, 168090, 269375, 280150, 323250, 420225, 538750, 700375, 808125, 840450, 1400750, 1616250, 2101125, 3501875, 4202250, 7003750, 10505625, 21011250]

約数ペア:

[(1, 21011250), (2, 10505625), (3, 7003750), (5, 4202250), (6, 3501875), (10, 2101125), (13, 1616250), (15, 1400750), (25, 840450), (26, 808125), (30, 700375), (39, 538750), (50, 420225), (65, 323250), (75, 280150), (78, 269375), (125, 168090), (130, 161625), (150, 140075), (195, 107750), (250, 84045), (325, 64650), (375, 56030), (390, 53875), (431, 48750), (625, 33618), (650, 32325), (750, 28015), (862, 24375), (975, 21550), (1250, 16809), (1293, 16250), (1625, 12930), (1875, 11206), (1950, 10775), (2155, 9750), (2586, 8125), (3250, 6465), (3750, 5603), (4310, 4875)]