21987632

素因数分解:

$2^4\times {\mathrm{23}}^1\times {\mathrm{149}}^1\times {\mathrm{401}}^1$

素因数の和:581

約数の個数: 40

約数和(自身を含む): 44863200

約数和(自身を除く): 22875568

約数列:

[1, 2, 4, 8, 16, 23, 46, 92, 149, 184, 298, 368, 401, 596, 802, 1192, 1604, 2384, 3208, 3427, 6416, 6854, 9223, 13708, 18446, 27416, 36892, 54832, 59749, 73784, 119498, 147568, 238996, 477992, 955984, 1374227, 2748454, 5496908, 10993816, 21987632]

約数ペア:

[(1, 21987632), (2, 10993816), (4, 5496908), (8, 2748454), (16, 1374227), (23, 955984), (46, 477992), (92, 238996), (149, 147568), (184, 119498), (298, 73784), (368, 59749), (401, 54832), (596, 36892), (802, 27416), (1192, 18446), (1604, 13708), (2384, 9223), (3208, 6854), (3427, 6416)]