21295840

素因数分解:

$2^5\times 5^1\times {\mathrm{167}}^1\times {\mathrm{797}}^1$

素因数の和:979

約数の個数: 48

約数和(自身を含む): 50676192

約数和(自身を除く): 29380352

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 167, 334, 668, 797, 835, 1336, 1594, 1670, 2672, 3188, 3340, 3985, 5344, 6376, 6680, 7970, 12752, 13360, 15940, 25504, 26720, 31880, 63760, 127520, 133099, 266198, 532396, 665495, 1064792, 1330990, 2129584, 2661980, 4259168, 5323960, 10647920, 21295840]

約数ペア:

[(1, 21295840), (2, 10647920), (4, 5323960), (5, 4259168), (8, 2661980), (10, 2129584), (16, 1330990), (20, 1064792), (32, 665495), (40, 532396), (80, 266198), (160, 133099), (167, 127520), (334, 63760), (668, 31880), (797, 26720), (835, 25504), (1336, 15940), (1594, 13360), (1670, 12752), (2672, 7970), (3188, 6680), (3340, 6376), (3985, 5344)]