21000391696

素因数分解:

$2^4\times {\mathrm{109}}^1\times {\mathrm{179}}^1\times {\mathrm{67271}}^1$

素因数の和:67567

約数の個数: 40

約数和(自身を含む): 41291553600

約数和(自身を除く): 20291161904

約数列:

[1, 2, 4, 8, 16, 109, 179, 218, 358, 436, 716, 872, 1432, 1744, 2864, 19511, 39022, 67271, 78044, 134542, 156088, 269084, 312176, 538168, 1076336, 7332539, 12041509, 14665078, 24083018, 29330156, 48166036, 58660312, 96332072, 117320624, 192664144, 1312524481, 2625048962, 5250097924, 10500195848, 21000391696]

約数ペア:

[(1, 21000391696), (2, 10500195848), (4, 5250097924), (8, 2625048962), (16, 1312524481), (109, 192664144), (179, 117320624), (218, 96332072), (358, 58660312), (436, 48166036), (716, 29330156), (872, 24083018), (1432, 14665078), (1744, 12041509), (2864, 7332539), (19511, 1076336), (39022, 538168), (67271, 312176), (78044, 269084), (134542, 156088)]