18804890

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{67}}^1\times {\mathrm{127}}^1$

素因数の和:231

約数の個数: 64

約数和(自身を含む): 39481344

約数和(自身を除く): 20676454

約数列:

[1, 2, 5, 10, 13, 17, 26, 34, 65, 67, 85, 127, 130, 134, 170, 221, 254, 335, 442, 635, 670, 871, 1105, 1139, 1270, 1651, 1742, 2159, 2210, 2278, 3302, 4318, 4355, 5695, 8255, 8509, 8710, 10795, 11390, 14807, 16510, 17018, 21590, 28067, 29614, 42545, 56134, 74035, 85090, 110617, 140335, 144653, 148070, 221234, 280670, 289306, 553085, 723265, 1106170, 1446530, 1880489, 3760978, 9402445, 18804890]

約数ペア:

[(1, 18804890), (2, 9402445), (5, 3760978), (10, 1880489), (13, 1446530), (17, 1106170), (26, 723265), (34, 553085), (65, 289306), (67, 280670), (85, 221234), (127, 148070), (130, 144653), (134, 140335), (170, 110617), (221, 85090), (254, 74035), (335, 56134), (442, 42545), (635, 29614), (670, 28067), (871, 21590), (1105, 17018), (1139, 16510), (1270, 14807), (1651, 11390), (1742, 10795), (2159, 8710), (2210, 8509), (2278, 8255), (3302, 5695), (4318, 4355)]