21205250

素因数分解:

$2^1\times 5^3\times {\mathrm{11}}^2\times {\mathrm{701}}^1$

素因数の和:740

約数の個数: 48

約数和(自身を含む): 43695288

約数和(自身を除く): 22490038

約数列:

[1, 2, 5, 10, 11, 22, 25, 50, 55, 110, 121, 125, 242, 250, 275, 550, 605, 701, 1210, 1375, 1402, 2750, 3025, 3505, 6050, 7010, 7711, 15125, 15422, 17525, 30250, 35050, 38555, 77110, 84821, 87625, 169642, 175250, 192775, 385550, 424105, 848210, 963875, 1927750, 2120525, 4241050, 10602625, 21205250]

約数ペア:

[(1, 21205250), (2, 10602625), (5, 4241050), (10, 2120525), (11, 1927750), (22, 963875), (25, 848210), (50, 424105), (55, 385550), (110, 192775), (121, 175250), (125, 169642), (242, 87625), (250, 84821), (275, 77110), (550, 38555), (605, 35050), (701, 30250), (1210, 17525), (1375, 15422), (1402, 15125), (2750, 7711), (3025, 7010), (3505, 6050)]