21678540

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{27793}}^1$

素因数の和:27818

約数の個数: 48

約数和(自身を含む): 65371488

約数和(自身を除く): 43692948

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 195, 260, 390, 780, 27793, 55586, 83379, 111172, 138965, 166758, 277930, 333516, 361309, 416895, 555860, 722618, 833790, 1083927, 1445236, 1667580, 1806545, 2167854, 3613090, 4335708, 5419635, 7226180, 10839270, 21678540]

約数ペア:

[(1, 21678540), (2, 10839270), (3, 7226180), (4, 5419635), (5, 4335708), (6, 3613090), (10, 2167854), (12, 1806545), (13, 1667580), (15, 1445236), (20, 1083927), (26, 833790), (30, 722618), (39, 555860), (52, 416895), (60, 361309), (65, 333516), (78, 277930), (130, 166758), (156, 138965), (195, 111172), (260, 83379), (390, 55586), (780, 27793)]