21268695

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{1523}}^1$

素因数の和:1564

約数の個数: 48

約数和(自身を含む): 41696640

約数和(自身を除く): 20427945

約数列:

[1, 3, 5, 7, 15, 19, 21, 35, 49, 57, 95, 105, 133, 147, 245, 285, 399, 665, 735, 931, 1523, 1995, 2793, 4569, 4655, 7615, 10661, 13965, 22845, 28937, 31983, 53305, 74627, 86811, 144685, 159915, 202559, 223881, 373135, 434055, 607677, 1012795, 1119405, 1417913, 3038385, 4253739, 7089565, 21268695]

約数ペア:

[(1, 21268695), (3, 7089565), (5, 4253739), (7, 3038385), (15, 1417913), (19, 1119405), (21, 1012795), (35, 607677), (49, 434055), (57, 373135), (95, 223881), (105, 202559), (133, 159915), (147, 144685), (245, 86811), (285, 74627), (399, 53305), (665, 31983), (735, 28937), (931, 22845), (1523, 13965), (1995, 10661), (2793, 7615), (4569, 4655)]