20957220

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{173}}^1\times {\mathrm{673}}^1$

素因数の和:861

約数の個数: 72

約数和(自身を含む): 64032696

約数和(自身を除く): 43075476

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 173, 180, 346, 519, 673, 692, 865, 1038, 1346, 1557, 1730, 2019, 2076, 2595, 2692, 3114, 3365, 3460, 4038, 5190, 6057, 6228, 6730, 7785, 8076, 10095, 10380, 12114, 13460, 15570, 20190, 24228, 30285, 31140, 40380, 60570, 116429, 121140, 232858, 349287, 465716, 582145, 698574, 1047861, 1164290, 1397148, 1746435, 2095722, 2328580, 3492870, 4191444, 5239305, 6985740, 10478610, 20957220]

約数ペア:

[(1, 20957220), (2, 10478610), (3, 6985740), (4, 5239305), (5, 4191444), (6, 3492870), (9, 2328580), (10, 2095722), (12, 1746435), (15, 1397148), (18, 1164290), (20, 1047861), (30, 698574), (36, 582145), (45, 465716), (60, 349287), (90, 232858), (173, 121140), (180, 116429), (346, 60570), (519, 40380), (673, 31140), (692, 30285), (865, 24228), (1038, 20190), (1346, 15570), (1557, 13460), (1730, 12114), (2019, 10380), (2076, 10095), (2595, 8076), (2692, 7785), (3114, 6730), (3365, 6228), (3460, 6057), (4038, 5190)]