21728272

素因数分解:

$2^4\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{617}}^1$

素因数の和:727

約数の個数: 40

約数和(自身を含む): 44140032

約数和(自身を除く): 22411760

約数列:

[1, 2, 4, 8, 16, 31, 62, 71, 124, 142, 248, 284, 496, 568, 617, 1136, 1234, 2201, 2468, 4402, 4936, 8804, 9872, 17608, 19127, 35216, 38254, 43807, 76508, 87614, 153016, 175228, 306032, 350456, 700912, 1358017, 2716034, 5432068, 10864136, 21728272]

約数ペア:

[(1, 21728272), (2, 10864136), (4, 5432068), (8, 2716034), (16, 1358017), (31, 700912), (62, 350456), (71, 306032), (124, 175228), (142, 153016), (248, 87614), (284, 76508), (496, 43807), (568, 38254), (617, 35216), (1136, 19127), (1234, 17608), (2201, 9872), (2468, 8804), (4402, 4936)]