20957380

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{131}}^1\times {\mathrm{421}}^1$

素因数の和:580

約数の個数: 48

約数和(自身を含む): 46791360

約数和(自身を除く): 25833980

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 131, 190, 262, 380, 421, 524, 655, 842, 1310, 1684, 2105, 2489, 2620, 4210, 4978, 7999, 8420, 9956, 12445, 15998, 24890, 31996, 39995, 49780, 55151, 79990, 110302, 159980, 220604, 275755, 551510, 1047869, 1103020, 2095738, 4191476, 5239345, 10478690, 20957380]

約数ペア:

[(1, 20957380), (2, 10478690), (4, 5239345), (5, 4191476), (10, 2095738), (19, 1103020), (20, 1047869), (38, 551510), (76, 275755), (95, 220604), (131, 159980), (190, 110302), (262, 79990), (380, 55151), (421, 49780), (524, 39995), (655, 31996), (842, 24890), (1310, 15998), (1684, 12445), (2105, 9956), (2489, 8420), (2620, 7999), (4210, 4978)]