21530720

素因数分解:

$2^5\times 5^1\times {\mathrm{53}}^1\times {\mathrm{2539}}^1$

素因数の和:2607

約数の個数: 48

約数和(自身を含む): 51846480

約数和(自身を除く): 30315760

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 53, 80, 106, 160, 212, 265, 424, 530, 848, 1060, 1696, 2120, 2539, 4240, 5078, 8480, 10156, 12695, 20312, 25390, 40624, 50780, 81248, 101560, 134567, 203120, 269134, 406240, 538268, 672835, 1076536, 1345670, 2153072, 2691340, 4306144, 5382680, 10765360, 21530720]

約数ペア:

[(1, 21530720), (2, 10765360), (4, 5382680), (5, 4306144), (8, 2691340), (10, 2153072), (16, 1345670), (20, 1076536), (32, 672835), (40, 538268), (53, 406240), (80, 269134), (106, 203120), (160, 134567), (212, 101560), (265, 81248), (424, 50780), (530, 40624), (848, 25390), (1060, 20312), (1696, 12695), (2120, 10156), (2539, 8480), (4240, 5078)]