21921250

素因数分解:

$2^1\times 5^4\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1$

素因数の和:125

約数の個数: 80

約数和(自身を含む): 47234880

約数和(自身を除く): 25313630

約数列:

[1, 2, 5, 10, 13, 19, 25, 26, 38, 50, 65, 71, 95, 125, 130, 142, 190, 247, 250, 325, 355, 475, 494, 625, 650, 710, 923, 950, 1235, 1250, 1349, 1625, 1775, 1846, 2375, 2470, 2698, 3250, 3550, 4615, 4750, 6175, 6745, 8125, 8875, 9230, 11875, 12350, 13490, 16250, 17537, 17750, 23075, 23750, 30875, 33725, 35074, 44375, 46150, 61750, 67450, 87685, 88750, 115375, 154375, 168625, 175370, 230750, 308750, 337250, 438425, 576875, 843125, 876850, 1153750, 1686250, 2192125, 4384250, 10960625, 21921250]

約数ペア:

[(1, 21921250), (2, 10960625), (5, 4384250), (10, 2192125), (13, 1686250), (19, 1153750), (25, 876850), (26, 843125), (38, 576875), (50, 438425), (65, 337250), (71, 308750), (95, 230750), (125, 175370), (130, 168625), (142, 154375), (190, 115375), (247, 88750), (250, 87685), (325, 67450), (355, 61750), (475, 46150), (494, 44375), (625, 35074), (650, 33725), (710, 30875), (923, 23750), (950, 23075), (1235, 17750), (1250, 17537), (1349, 16250), (1625, 13490), (1775, 12350), (1846, 11875), (2375, 9230), (2470, 8875), (2698, 8125), (3250, 6745), (3550, 6175), (4615, 4750)]