18894280

素因数分解:

$2^3\times 5^1\times {\mathrm{563}}^1\times {\mathrm{839}}^1$

素因数の和:1413

約数の個数: 32

約数和(自身を含む): 42638400

約数和(自身を除く): 23744120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 563, 839, 1126, 1678, 2252, 2815, 3356, 4195, 4504, 5630, 6712, 8390, 11260, 16780, 22520, 33560, 472357, 944714, 1889428, 2361785, 3778856, 4723570, 9447140, 18894280]

約数ペア:

[(1, 18894280), (2, 9447140), (4, 4723570), (5, 3778856), (8, 2361785), (10, 1889428), (20, 944714), (40, 472357), (563, 33560), (839, 22520), (1126, 16780), (1678, 11260), (2252, 8390), (2815, 6712), (3356, 5630), (4195, 4504)]