21783460

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{79}}^1\times {\mathrm{811}}^1$

素因数の和:916

約数の個数: 48

約数和(自身を含む): 49109760

約数和(自身を除く): 27326300

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 79, 85, 158, 170, 316, 340, 395, 790, 811, 1343, 1580, 1622, 2686, 3244, 4055, 5372, 6715, 8110, 13430, 13787, 16220, 26860, 27574, 55148, 64069, 68935, 128138, 137870, 256276, 275740, 320345, 640690, 1089173, 1281380, 2178346, 4356692, 5445865, 10891730, 21783460]

約数ペア:

[(1, 21783460), (2, 10891730), (4, 5445865), (5, 4356692), (10, 2178346), (17, 1281380), (20, 1089173), (34, 640690), (68, 320345), (79, 275740), (85, 256276), (158, 137870), (170, 128138), (316, 68935), (340, 64069), (395, 55148), (790, 27574), (811, 26860), (1343, 16220), (1580, 13787), (1622, 13430), (2686, 8110), (3244, 6715), (4055, 5372)]