21720378

素因数分解:

$2^1\times 3^1\times {\mathrm{59}}^1\times {\mathrm{61357}}^1$

素因数の和:61421

約数の個数: 16

約数和(自身を含む): 44177760

約数和(自身を除く): 22457382

約数列:

[1, 2, 3, 6, 59, 118, 177, 354, 61357, 122714, 184071, 368142, 3620063, 7240126, 10860189, 21720378]

約数ペア:

[(1, 21720378), (2, 10860189), (3, 7240126), (6, 3620063), (59, 368142), (118, 184071), (177, 122714), (354, 61357)]