21716760

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{13921}}^1$

素因数の和:13948

約数の個数: 64

約数和(自身を含む): 70166880

約数和(自身を除く): 48450120

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 20, 24, 26, 30, 39, 40, 52, 60, 65, 78, 104, 120, 130, 156, 195, 260, 312, 390, 520, 780, 1560, 13921, 27842, 41763, 55684, 69605, 83526, 111368, 139210, 167052, 180973, 208815, 278420, 334104, 361946, 417630, 542919, 556840, 723892, 835260, 904865, 1085838, 1447784, 1670520, 1809730, 2171676, 2714595, 3619460, 4343352, 5429190, 7238920, 10858380, 21716760]

約数ペア:

[(1, 21716760), (2, 10858380), (3, 7238920), (4, 5429190), (5, 4343352), (6, 3619460), (8, 2714595), (10, 2171676), (12, 1809730), (13, 1670520), (15, 1447784), (20, 1085838), (24, 904865), (26, 835260), (30, 723892), (39, 556840), (40, 542919), (52, 417630), (60, 361946), (65, 334104), (78, 278420), (104, 208815), (120, 180973), (130, 167052), (156, 139210), (195, 111368), (260, 83526), (312, 69605), (390, 55684), (520, 41763), (780, 27842), (1560, 13921)]