18967640

素因数分解:

$2^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{53}}^1\times {\mathrm{389}}^1$

素因数の和:476

約数の個数: 64

約数和(自身を含む): 45489600

約数和(自身を除く): 26521960

約数列:

[1, 2, 4, 5, 8, 10, 20, 23, 40, 46, 53, 92, 106, 115, 184, 212, 230, 265, 389, 424, 460, 530, 778, 920, 1060, 1219, 1556, 1945, 2120, 2438, 3112, 3890, 4876, 6095, 7780, 8947, 9752, 12190, 15560, 17894, 20617, 24380, 35788, 41234, 44735, 48760, 71576, 82468, 89470, 103085, 164936, 178940, 206170, 357880, 412340, 474191, 824680, 948382, 1896764, 2370955, 3793528, 4741910, 9483820, 18967640]

約数ペア:

[(1, 18967640), (2, 9483820), (4, 4741910), (5, 3793528), (8, 2370955), (10, 1896764), (20, 948382), (23, 824680), (40, 474191), (46, 412340), (53, 357880), (92, 206170), (106, 178940), (115, 164936), (184, 103085), (212, 89470), (230, 82468), (265, 71576), (389, 48760), (424, 44735), (460, 41234), (530, 35788), (778, 24380), (920, 20617), (1060, 17894), (1219, 15560), (1556, 12190), (1945, 9752), (2120, 8947), (2438, 7780), (3112, 6095), (3890, 4876)]