20547225

素因数分解:

$3^2\times 5^2\times {\mathrm{29}}^1\times {\mathrm{47}}^1\times {\mathrm{67}}^1$

素因数の和:159

約数の個数: 72

約数和(自身を含む): 39461760

約数和(自身を除く): 18914535

約数列:

[1, 3, 5, 9, 15, 25, 29, 45, 47, 67, 75, 87, 141, 145, 201, 225, 235, 261, 335, 423, 435, 603, 705, 725, 1005, 1175, 1305, 1363, 1675, 1943, 2115, 2175, 3015, 3149, 3525, 4089, 5025, 5829, 6525, 6815, 9447, 9715, 10575, 12267, 15075, 15745, 17487, 20445, 28341, 29145, 34075, 47235, 48575, 61335, 78725, 87435, 91321, 102225, 141705, 145725, 236175, 273963, 306675, 437175, 456605, 708525, 821889, 1369815, 2283025, 4109445, 6849075, 20547225]

約数ペア:

[(1, 20547225), (3, 6849075), (5, 4109445), (9, 2283025), (15, 1369815), (25, 821889), (29, 708525), (45, 456605), (47, 437175), (67, 306675), (75, 273963), (87, 236175), (141, 145725), (145, 141705), (201, 102225), (225, 91321), (235, 87435), (261, 78725), (335, 61335), (423, 48575), (435, 47235), (603, 34075), (705, 29145), (725, 28341), (1005, 20445), (1175, 17487), (1305, 15745), (1363, 15075), (1675, 12267), (1943, 10575), (2115, 9715), (2175, 9447), (3015, 6815), (3149, 6525), (3525, 5829), (4089, 5025)]