21791480

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{541}}^1$

素因数の和:624

約数の個数: 64

約数和(自身を含む): 52682400

約数和(自身を除く): 30890920

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 53, 76, 95, 106, 152, 190, 212, 265, 380, 424, 530, 541, 760, 1007, 1060, 1082, 2014, 2120, 2164, 2705, 4028, 4328, 5035, 5410, 8056, 10070, 10279, 10820, 20140, 20558, 21640, 28673, 40280, 41116, 51395, 57346, 82232, 102790, 114692, 143365, 205580, 229384, 286730, 411160, 544787, 573460, 1089574, 1146920, 2179148, 2723935, 4358296, 5447870, 10895740, 21791480]

約数ペア:

[(1, 21791480), (2, 10895740), (4, 5447870), (5, 4358296), (8, 2723935), (10, 2179148), (19, 1146920), (20, 1089574), (38, 573460), (40, 544787), (53, 411160), (76, 286730), (95, 229384), (106, 205580), (152, 143365), (190, 114692), (212, 102790), (265, 82232), (380, 57346), (424, 51395), (530, 41116), (541, 40280), (760, 28673), (1007, 21640), (1060, 20558), (1082, 20140), (2014, 10820), (2120, 10279), (2164, 10070), (2705, 8056), (4028, 5410), (4328, 5035)]