21049725

素因数分解:

$3^1\times 5^2\times {\mathrm{59}}^1\times {\mathrm{67}}^1\times {\mathrm{71}}^1$

素因数の和:210

約数の個数: 48

約数和(自身を含む): 36426240

約数和(自身を除く): 15376515

約数列:

[1, 3, 5, 15, 25, 59, 67, 71, 75, 177, 201, 213, 295, 335, 355, 885, 1005, 1065, 1475, 1675, 1775, 3953, 4189, 4425, 4757, 5025, 5325, 11859, 12567, 14271, 19765, 20945, 23785, 59295, 62835, 71355, 98825, 104725, 118925, 280663, 296475, 314175, 356775, 841989, 1403315, 4209945, 7016575, 21049725]

約数ペア:

[(1, 21049725), (3, 7016575), (5, 4209945), (15, 1403315), (25, 841989), (59, 356775), (67, 314175), (71, 296475), (75, 280663), (177, 118925), (201, 104725), (213, 98825), (295, 71355), (335, 62835), (355, 59295), (885, 23785), (1005, 20945), (1065, 19765), (1475, 14271), (1675, 12567), (1775, 11859), (3953, 5325), (4189, 5025), (4425, 4757)]