178906900

素因数分解:

$2^2\times 5^2\times {\mathrm{61}}^1\times {\mathrm{139}}^1\times {\mathrm{211}}^1$

素因数の和:425

約数の個数: 72

約数和(自身を含む): 399314720

約数和(自身を除く): 220407820

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 61, 100, 122, 139, 211, 244, 278, 305, 422, 556, 610, 695, 844, 1055, 1220, 1390, 1525, 2110, 2780, 3050, 3475, 4220, 5275, 6100, 6950, 8479, 10550, 12871, 13900, 16958, 21100, 25742, 29329, 33916, 42395, 51484, 58658, 64355, 84790, 117316, 128710, 146645, 169580, 211975, 257420, 293290, 321775, 423950, 586580, 643550, 733225, 847900, 1287100, 1466450, 1789069, 2932900, 3578138, 7156276, 8945345, 17890690, 35781380, 44726725, 89453450, 178906900]

約数ペア:

[(1, 178906900), (2, 89453450), (4, 44726725), (5, 35781380), (10, 17890690), (20, 8945345), (25, 7156276), (50, 3578138), (61, 2932900), (100, 1789069), (122, 1466450), (139, 1287100), (211, 847900), (244, 733225), (278, 643550), (305, 586580), (422, 423950), (556, 321775), (610, 293290), (695, 257420), (844, 211975), (1055, 169580), (1220, 146645), (1390, 128710), (1525, 117316), (2110, 84790), (2780, 64355), (3050, 58658), (3475, 51484), (4220, 42395), (5275, 33916), (6100, 29329), (6950, 25742), (8479, 21100), (10550, 16958), (12871, 13900)]