21431800

素因数分解:

$2^3\times 5^2\times {\mathrm{13}}^1\times {\mathrm{8243}}^1$

素因数の和:8272

約数の個数: 48

約数和(自身を含む): 53668440

約数和(自身を除く): 32236640

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 25, 26, 40, 50, 52, 65, 100, 104, 130, 200, 260, 325, 520, 650, 1300, 2600, 8243, 16486, 32972, 41215, 65944, 82430, 107159, 164860, 206075, 214318, 329720, 412150, 428636, 535795, 824300, 857272, 1071590, 1648600, 2143180, 2678975, 4286360, 5357950, 10715900, 21431800]

約数ペア:

[(1, 21431800), (2, 10715900), (4, 5357950), (5, 4286360), (8, 2678975), (10, 2143180), (13, 1648600), (20, 1071590), (25, 857272), (26, 824300), (40, 535795), (50, 428636), (52, 412150), (65, 329720), (100, 214318), (104, 206075), (130, 164860), (200, 107159), (260, 82430), (325, 65944), (520, 41215), (650, 32972), (1300, 16486), (2600, 8243)]