20497140

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{4951}}^1$

素因数の和:4989

約数の個数: 72

約数和(自身を含む): 64891008

約数和(自身を除く): 44393868

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 23, 30, 36, 45, 46, 60, 69, 90, 92, 115, 138, 180, 207, 230, 276, 345, 414, 460, 690, 828, 1035, 1380, 2070, 4140, 4951, 9902, 14853, 19804, 24755, 29706, 44559, 49510, 59412, 74265, 89118, 99020, 113873, 148530, 178236, 222795, 227746, 297060, 341619, 445590, 455492, 569365, 683238, 891180, 1024857, 1138730, 1366476, 1708095, 2049714, 2277460, 3416190, 4099428, 5124285, 6832380, 10248570, 20497140]

約数ペア:

[(1, 20497140), (2, 10248570), (3, 6832380), (4, 5124285), (5, 4099428), (6, 3416190), (9, 2277460), (10, 2049714), (12, 1708095), (15, 1366476), (18, 1138730), (20, 1024857), (23, 891180), (30, 683238), (36, 569365), (45, 455492), (46, 445590), (60, 341619), (69, 297060), (90, 227746), (92, 222795), (115, 178236), (138, 148530), (180, 113873), (207, 99020), (230, 89118), (276, 74265), (345, 59412), (414, 49510), (460, 44559), (690, 29706), (828, 24755), (1035, 19804), (1380, 14853), (2070, 9902), (4140, 4951)]