21787444780

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{401}}^1\times {\mathrm{142981}}^1$

素因数の和:143410

約数の個数: 48

約数和(自身を含む): 48282161760

約数和(自身を除く): 26494716980

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 380, 401, 802, 1604, 2005, 4010, 7619, 8020, 15238, 30476, 38095, 76190, 142981, 152380, 285962, 571924, 714905, 1429810, 2716639, 2859620, 5433278, 10866556, 13583195, 27166390, 54332780, 57335381, 114670762, 229341524, 286676905, 573353810, 1089372239, 1146707620, 2178744478, 4357488956, 5446861195, 10893722390, 21787444780]

約数ペア:

[(1, 21787444780), (2, 10893722390), (4, 5446861195), (5, 4357488956), (10, 2178744478), (19, 1146707620), (20, 1089372239), (38, 573353810), (76, 286676905), (95, 229341524), (190, 114670762), (380, 57335381), (401, 54332780), (802, 27166390), (1604, 13583195), (2005, 10866556), (4010, 5433278), (7619, 2859620), (8020, 2716639), (15238, 1429810), (30476, 714905), (38095, 571924), (76190, 285962), (142981, 152380)]