21407216

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{211}}^1\times {\mathrm{373}}^1$

素因数の和:609

約数の個数: 40

約数和(自身を含む): 44242704

約数和(自身を除く): 22835488

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 136, 211, 272, 373, 422, 746, 844, 1492, 1688, 2984, 3376, 3587, 5968, 6341, 7174, 12682, 14348, 25364, 28696, 50728, 57392, 78703, 101456, 157406, 314812, 629624, 1259248, 1337951, 2675902, 5351804, 10703608, 21407216]

約数ペア:

[(1, 21407216), (2, 10703608), (4, 5351804), (8, 2675902), (16, 1337951), (17, 1259248), (34, 629624), (68, 314812), (136, 157406), (211, 101456), (272, 78703), (373, 57392), (422, 50728), (746, 28696), (844, 25364), (1492, 14348), (1688, 12682), (2984, 7174), (3376, 6341), (3587, 5968)]