19341820

素因数分解:

$2^2\times 5^1\times {\mathrm{53}}^1\times {\mathrm{71}}^1\times {\mathrm{257}}^1$

素因数の和:390

約数の個数: 48

約数和(自身を含む): 42130368

約数和(自身を除く): 22788548

約数列:

[1, 2, 4, 5, 10, 20, 53, 71, 106, 142, 212, 257, 265, 284, 355, 514, 530, 710, 1028, 1060, 1285, 1420, 2570, 3763, 5140, 7526, 13621, 15052, 18247, 18815, 27242, 36494, 37630, 54484, 68105, 72988, 75260, 91235, 136210, 182470, 272420, 364940, 967091, 1934182, 3868364, 4835455, 9670910, 19341820]

約数ペア:

[(1, 19341820), (2, 9670910), (4, 4835455), (5, 3868364), (10, 1934182), (20, 967091), (53, 364940), (71, 272420), (106, 182470), (142, 136210), (212, 91235), (257, 75260), (265, 72988), (284, 68105), (355, 54484), (514, 37630), (530, 36494), (710, 27242), (1028, 18815), (1060, 18247), (1285, 15052), (1420, 13621), (2570, 7526), (3763, 5140)]