21418540

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{7489}}^1$

素因数の和:7522

約数の個数: 48

約数和(自身を含む): 52849440

約数和(自身を除く): 31430900

約数列:

[1, 2, 4, 5, 10, 11, 13, 20, 22, 26, 44, 52, 55, 65, 110, 130, 143, 220, 260, 286, 572, 715, 1430, 2860, 7489, 14978, 29956, 37445, 74890, 82379, 97357, 149780, 164758, 194714, 329516, 389428, 411895, 486785, 823790, 973570, 1070927, 1647580, 1947140, 2141854, 4283708, 5354635, 10709270, 21418540]

約数ペア:

[(1, 21418540), (2, 10709270), (4, 5354635), (5, 4283708), (10, 2141854), (11, 1947140), (13, 1647580), (20, 1070927), (22, 973570), (26, 823790), (44, 486785), (52, 411895), (55, 389428), (65, 329516), (110, 194714), (130, 164758), (143, 149780), (220, 97357), (260, 82379), (286, 74890), (572, 37445), (715, 29956), (1430, 14978), (2860, 7489)]