21228795

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{3547}}^1$

素因数の和:3584

約数の個数: 48

約数和(自身を含む): 44279040

約数和(自身を除く): 23050245

約数列:

[1, 3, 5, 7, 9, 15, 19, 21, 35, 45, 57, 63, 95, 105, 133, 171, 285, 315, 399, 665, 855, 1197, 1995, 3547, 5985, 10641, 17735, 24829, 31923, 53205, 67393, 74487, 124145, 159615, 202179, 223461, 336965, 372435, 471751, 606537, 1010895, 1117305, 1415253, 2358755, 3032685, 4245759, 7076265, 21228795]

約数ペア:

[(1, 21228795), (3, 7076265), (5, 4245759), (7, 3032685), (9, 2358755), (15, 1415253), (19, 1117305), (21, 1010895), (35, 606537), (45, 471751), (57, 372435), (63, 336965), (95, 223461), (105, 202179), (133, 159615), (171, 124145), (285, 74487), (315, 67393), (399, 53205), (665, 31923), (855, 24829), (1197, 17735), (1995, 10641), (3547, 5985)]