18587320

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{661}}^1$

素因数の和:728

約数の個数: 64

約数和(自身を含む): 45280800

約数和(自身を除く): 26693480

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 37, 38, 40, 74, 76, 95, 148, 152, 185, 190, 296, 370, 380, 661, 703, 740, 760, 1322, 1406, 1480, 2644, 2812, 3305, 3515, 5288, 5624, 6610, 7030, 12559, 13220, 14060, 24457, 25118, 26440, 28120, 48914, 50236, 62795, 97828, 100472, 122285, 125590, 195656, 244570, 251180, 464683, 489140, 502360, 929366, 978280, 1858732, 2323415, 3717464, 4646830, 9293660, 18587320]

約数ペア:

[(1, 18587320), (2, 9293660), (4, 4646830), (5, 3717464), (8, 2323415), (10, 1858732), (19, 978280), (20, 929366), (37, 502360), (38, 489140), (40, 464683), (74, 251180), (76, 244570), (95, 195656), (148, 125590), (152, 122285), (185, 100472), (190, 97828), (296, 62795), (370, 50236), (380, 48914), (661, 28120), (703, 26440), (740, 25118), (760, 24457), (1322, 14060), (1406, 13220), (1480, 12559), (2644, 7030), (2812, 6610), (3305, 5624), (3515, 5288)]