16915780

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{41}}^1\times {\mathrm{421}}^1$

素因数の和:485

約数の個数: 72

約数和(自身を含む): 42431256

約数和(自身を除く): 25515476

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 41, 49, 70, 82, 98, 140, 164, 196, 205, 245, 287, 410, 421, 490, 574, 820, 842, 980, 1148, 1435, 1684, 2009, 2105, 2870, 2947, 4018, 4210, 5740, 5894, 8036, 8420, 10045, 11788, 14735, 17261, 20090, 20629, 29470, 34522, 40180, 41258, 58940, 69044, 82516, 86305, 103145, 120827, 172610, 206290, 241654, 345220, 412580, 483308, 604135, 845789, 1208270, 1691578, 2416540, 3383156, 4228945, 8457890, 16915780]

約数ペア:

[(1, 16915780), (2, 8457890), (4, 4228945), (5, 3383156), (7, 2416540), (10, 1691578), (14, 1208270), (20, 845789), (28, 604135), (35, 483308), (41, 412580), (49, 345220), (70, 241654), (82, 206290), (98, 172610), (140, 120827), (164, 103145), (196, 86305), (205, 82516), (245, 69044), (287, 58940), (410, 41258), (421, 40180), (490, 34522), (574, 29470), (820, 20629), (842, 20090), (980, 17261), (1148, 14735), (1435, 11788), (1684, 10045), (2009, 8420), (2105, 8036), (2870, 5894), (2947, 5740), (4018, 4210)]