19902350

素因数分解:

$2^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{457}}^1$

素因数の和:549

約数の個数: 48

約数和(自身を含む): 40549488

約数和(自身を除く): 20647138

約数列:

[1, 2, 5, 10, 13, 25, 26, 50, 65, 67, 130, 134, 325, 335, 457, 650, 670, 871, 914, 1675, 1742, 2285, 3350, 4355, 4570, 5941, 8710, 11425, 11882, 21775, 22850, 29705, 30619, 43550, 59410, 61238, 148525, 153095, 297050, 306190, 398047, 765475, 796094, 1530950, 1990235, 3980470, 9951175, 19902350]

約数ペア:

[(1, 19902350), (2, 9951175), (5, 3980470), (10, 1990235), (13, 1530950), (25, 796094), (26, 765475), (50, 398047), (65, 306190), (67, 297050), (130, 153095), (134, 148525), (325, 61238), (335, 59410), (457, 43550), (650, 30619), (670, 29705), (871, 22850), (914, 21775), (1675, 11882), (1742, 11425), (2285, 8710), (3350, 5941), (4355, 4570)]