20105990

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{41}}^1\times {\mathrm{89}}^1$

素因数の和:185

約数の個数: 64

約数和(自身を含む): 40824000

約数和(自身を除く): 20718010

約数列:

[1, 2, 5, 10, 19, 29, 38, 41, 58, 82, 89, 95, 145, 178, 190, 205, 290, 410, 445, 551, 779, 890, 1102, 1189, 1558, 1691, 2378, 2581, 2755, 3382, 3649, 3895, 5162, 5510, 5945, 7298, 7790, 8455, 11890, 12905, 16910, 18245, 22591, 25810, 36490, 45182, 49039, 69331, 98078, 105821, 112955, 138662, 211642, 225910, 245195, 346655, 490390, 529105, 693310, 1058210, 2010599, 4021198, 10052995, 20105990]

約数ペア:

[(1, 20105990), (2, 10052995), (5, 4021198), (10, 2010599), (19, 1058210), (29, 693310), (38, 529105), (41, 490390), (58, 346655), (82, 245195), (89, 225910), (95, 211642), (145, 138662), (178, 112955), (190, 105821), (205, 98078), (290, 69331), (410, 49039), (445, 45182), (551, 36490), (779, 25810), (890, 22591), (1102, 18245), (1189, 16910), (1558, 12905), (1691, 11890), (2378, 8455), (2581, 7790), (2755, 7298), (3382, 5945), (3649, 5510), (3895, 5162)]