21958220

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^2\times {\mathrm{29}}^1\times {\mathrm{131}}^1$

素因数の和:203

約数の個数: 72

約数和(自身を含む): 51060240

約数和(自身を除く): 29102020

約数列:

[1, 2, 4, 5, 10, 17, 20, 29, 34, 58, 68, 85, 116, 131, 145, 170, 262, 289, 290, 340, 493, 524, 578, 580, 655, 986, 1156, 1310, 1445, 1972, 2227, 2465, 2620, 2890, 3799, 4454, 4930, 5780, 7598, 8381, 8908, 9860, 11135, 15196, 16762, 18995, 22270, 33524, 37859, 37990, 41905, 44540, 64583, 75718, 75980, 83810, 129166, 151436, 167620, 189295, 258332, 322915, 378590, 645830, 757180, 1097911, 1291660, 2195822, 4391644, 5489555, 10979110, 21958220]

約数ペア:

[(1, 21958220), (2, 10979110), (4, 5489555), (5, 4391644), (10, 2195822), (17, 1291660), (20, 1097911), (29, 757180), (34, 645830), (58, 378590), (68, 322915), (85, 258332), (116, 189295), (131, 167620), (145, 151436), (170, 129166), (262, 83810), (289, 75980), (290, 75718), (340, 64583), (493, 44540), (524, 41905), (578, 37990), (580, 37859), (655, 33524), (986, 22270), (1156, 18995), (1310, 16762), (1445, 15196), (1972, 11135), (2227, 9860), (2465, 8908), (2620, 8381), (2890, 7598), (3799, 5780), (4454, 4930)]