21901840

素因数分解:

$2^4\times 5^1\times {\mathrm{273773}}^1$

素因数の和:273786

約数の個数: 20

約数和(自身を含む): 50921964

約数和(自身を除く): 29020124

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 273773, 547546, 1095092, 1368865, 2190184, 2737730, 4380368, 5475460, 10950920, 21901840]

約数ペア:

[(1, 21901840), (2, 10950920), (4, 5475460), (5, 4380368), (8, 2737730), (10, 2190184), (16, 1368865), (20, 1095092), (40, 547546), (80, 273773)]