21193640

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{769}}^1$

素因数の和:846

約数の個数: 64

約数和(自身を含む): 52390800

約数和(自身を除く): 31197160

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 53, 65, 104, 106, 130, 212, 260, 265, 424, 520, 530, 689, 769, 1060, 1378, 1538, 2120, 2756, 3076, 3445, 3845, 5512, 6152, 6890, 7690, 9997, 13780, 15380, 19994, 27560, 30760, 39988, 40757, 49985, 79976, 81514, 99970, 163028, 199940, 203785, 326056, 399880, 407570, 529841, 815140, 1059682, 1630280, 2119364, 2649205, 4238728, 5298410, 10596820, 21193640]

約数ペア:

[(1, 21193640), (2, 10596820), (4, 5298410), (5, 4238728), (8, 2649205), (10, 2119364), (13, 1630280), (20, 1059682), (26, 815140), (40, 529841), (52, 407570), (53, 399880), (65, 326056), (104, 203785), (106, 199940), (130, 163028), (212, 99970), (260, 81514), (265, 79976), (424, 49985), (520, 40757), (530, 39988), (689, 30760), (769, 27560), (1060, 19994), (1378, 15380), (1538, 13780), (2120, 9997), (2756, 7690), (3076, 6890), (3445, 6152), (3845, 5512)]