21277340

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{19}}^2\times {\mathrm{421}}^1$

素因数の和:475

約数の個数: 72

約数和(自身を含む): 54022752

約数和(自身を除く): 32745412

約数列:

[1, 2, 4, 5, 7, 10, 14, 19, 20, 28, 35, 38, 70, 76, 95, 133, 140, 190, 266, 361, 380, 421, 532, 665, 722, 842, 1330, 1444, 1684, 1805, 2105, 2527, 2660, 2947, 3610, 4210, 5054, 5894, 7220, 7999, 8420, 10108, 11788, 12635, 14735, 15998, 25270, 29470, 31996, 39995, 50540, 55993, 58940, 79990, 111986, 151981, 159980, 223972, 279965, 303962, 559930, 607924, 759905, 1063867, 1119860, 1519810, 2127734, 3039620, 4255468, 5319335, 10638670, 21277340]

約数ペア:

[(1, 21277340), (2, 10638670), (4, 5319335), (5, 4255468), (7, 3039620), (10, 2127734), (14, 1519810), (19, 1119860), (20, 1063867), (28, 759905), (35, 607924), (38, 559930), (70, 303962), (76, 279965), (95, 223972), (133, 159980), (140, 151981), (190, 111986), (266, 79990), (361, 58940), (380, 55993), (421, 50540), (532, 39995), (665, 31996), (722, 29470), (842, 25270), (1330, 15998), (1444, 14735), (1684, 12635), (1805, 11788), (2105, 10108), (2527, 8420), (2660, 7999), (2947, 7220), (3610, 5894), (4210, 5054)]