21605896

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{83}}^1\times {\mathrm{2503}}^1$

素因数の和:2605

約数の個数: 32

約数和(自身を含む): 44170560

約数和(自身を除く): 22564664

約数列:

[1, 2, 4, 8, 13, 26, 52, 83, 104, 166, 332, 664, 1079, 2158, 2503, 4316, 5006, 8632, 10012, 20024, 32539, 65078, 130156, 207749, 260312, 415498, 830996, 1661992, 2700737, 5401474, 10802948, 21605896]

約数ペア:

[(1, 21605896), (2, 10802948), (4, 5401474), (8, 2700737), (13, 1661992), (26, 830996), (52, 415498), (83, 260312), (104, 207749), (166, 130156), (332, 65078), (664, 32539), (1079, 20024), (2158, 10012), (2503, 8632), (4316, 5006)]