21876237

素因数分解:

$3^4\times {\mathrm{29}}^1\times {\mathrm{67}}^1\times {\mathrm{139}}^1$

素因数の和:247

約数の個数: 40

約数和(自身を含む): 34557600

約数和(自身を除く): 12681363

約数列:

[1, 3, 9, 27, 29, 67, 81, 87, 139, 201, 261, 417, 603, 783, 1251, 1809, 1943, 2349, 3753, 4031, 5427, 5829, 9313, 11259, 12093, 17487, 27939, 36279, 52461, 83817, 108837, 157383, 251451, 270077, 326511, 754353, 810231, 2430693, 7292079, 21876237]

約数ペア:

[(1, 21876237), (3, 7292079), (9, 2430693), (27, 810231), (29, 754353), (67, 326511), (81, 270077), (87, 251451), (139, 157383), (201, 108837), (261, 83817), (417, 52461), (603, 36279), (783, 27939), (1251, 17487), (1809, 12093), (1943, 11259), (2349, 9313), (3753, 5829), (4031, 5427)]