261820

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1$

素因数の和:94

約数の個数: 48

約数和(自身を含む): 635040

約数和(自身を除く): 373220

約数列:

[1, 2, 4, 5, 10, 13, 19, 20, 26, 38, 52, 53, 65, 76, 95, 106, 130, 190, 212, 247, 260, 265, 380, 494, 530, 689, 988, 1007, 1060, 1235, 1378, 2014, 2470, 2756, 3445, 4028, 4940, 5035, 6890, 10070, 13091, 13780, 20140, 26182, 52364, 65455, 130910, 261820]

約数ペア:

[(1, 261820), (2, 130910), (4, 65455), (5, 52364), (10, 26182), (13, 20140), (19, 13780), (20, 13091), (26, 10070), (38, 6890), (52, 5035), (53, 4940), (65, 4028), (76, 3445), (95, 2756), (106, 2470), (130, 2014), (190, 1378), (212, 1235), (247, 1060), (260, 1007), (265, 988), (380, 689), (494, 530)]