21640840

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{41617}}^1$

素因数の和:41641

約数の個数: 32

約数和(自身を含む): 52438680

約数和(自身を除く): 30797840

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 41617, 83234, 166468, 208085, 332936, 416170, 541021, 832340, 1082042, 1664680, 2164084, 2705105, 4328168, 5410210, 10820420, 21640840]

約数ペア:

[(1, 21640840), (2, 10820420), (4, 5410210), (5, 4328168), (8, 2705105), (10, 2164084), (13, 1664680), (20, 1082042), (26, 832340), (40, 541021), (52, 416170), (65, 332936), (104, 208085), (130, 166468), (260, 83234), (520, 41617)]