19918260

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{239}}^1\times {\mathrm{463}}^1$

素因数の和:717

約数の個数: 72

約数和(自身を含む): 60802560

約数和(自身を除く): 40884300

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 239, 463, 478, 717, 926, 956, 1195, 1389, 1434, 1852, 2151, 2315, 2390, 2778, 2868, 3585, 4167, 4302, 4630, 4780, 5556, 6945, 7170, 8334, 8604, 9260, 10755, 13890, 14340, 16668, 20835, 21510, 27780, 41670, 43020, 83340, 110657, 221314, 331971, 442628, 553285, 663942, 995913, 1106570, 1327884, 1659855, 1991826, 2213140, 3319710, 3983652, 4979565, 6639420, 9959130, 19918260]

約数ペア:

[(1, 19918260), (2, 9959130), (3, 6639420), (4, 4979565), (5, 3983652), (6, 3319710), (9, 2213140), (10, 1991826), (12, 1659855), (15, 1327884), (18, 1106570), (20, 995913), (30, 663942), (36, 553285), (45, 442628), (60, 331971), (90, 221314), (180, 110657), (239, 83340), (463, 43020), (478, 41670), (717, 27780), (926, 21510), (956, 20835), (1195, 16668), (1389, 14340), (1434, 13890), (1852, 10755), (2151, 9260), (2315, 8604), (2390, 8334), (2778, 7170), (2868, 6945), (3585, 5556), (4167, 4780), (4302, 4630)]