21901256

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{251}}^1\times {\mathrm{839}}^1$

素因数の和:1109

約数の個数: 32

約数和(自身を含む): 44452800

約数和(自身を除く): 22551544

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 251, 502, 839, 1004, 1678, 2008, 3263, 3356, 6526, 6712, 10907, 13052, 21814, 26104, 43628, 87256, 210589, 421178, 842356, 1684712, 2737657, 5475314, 10950628, 21901256]

約数ペア:

[(1, 21901256), (2, 10950628), (4, 5475314), (8, 2737657), (13, 1684712), (26, 842356), (52, 421178), (104, 210589), (251, 87256), (502, 43628), (839, 26104), (1004, 21814), (1678, 13052), (2008, 10907), (3263, 6712), (3356, 6526)]