21975880

素因数分解:

$2^3\times 5^1\times {\mathrm{89}}^1\times {\mathrm{6173}}^1$

素因数の和:6273

約数の個数: 32

約数和(自身を含む): 50009400

約数和(自身を除く): 28033520

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 89, 178, 356, 445, 712, 890, 1780, 3560, 6173, 12346, 24692, 30865, 49384, 61730, 123460, 246920, 549397, 1098794, 2197588, 2746985, 4395176, 5493970, 10987940, 21975880]

約数ペア:

[(1, 21975880), (2, 10987940), (4, 5493970), (5, 4395176), (8, 2746985), (10, 2197588), (20, 1098794), (40, 549397), (89, 246920), (178, 123460), (356, 61730), (445, 49384), (712, 30865), (890, 24692), (1780, 12346), (3560, 6173)]