21131344

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{5347}}^1$

素因数の和:5387

約数の個数: 40

約数和(自身を含む): 46420640

約数和(自身を除く): 25289296

約数列:

[1, 2, 4, 8, 13, 16, 19, 26, 38, 52, 76, 104, 152, 208, 247, 304, 494, 988, 1976, 3952, 5347, 10694, 21388, 42776, 69511, 85552, 101593, 139022, 203186, 278044, 406372, 556088, 812744, 1112176, 1320709, 1625488, 2641418, 5282836, 10565672, 21131344]

約数ペア:

[(1, 21131344), (2, 10565672), (4, 5282836), (8, 2641418), (13, 1625488), (16, 1320709), (19, 1112176), (26, 812744), (38, 556088), (52, 406372), (76, 278044), (104, 203186), (152, 139022), (208, 101593), (247, 85552), (304, 69511), (494, 42776), (988, 21388), (1976, 10694), (3952, 5347)]