20618720

素因数分解:

$2^5\times 5^1\times {\mathrm{31}}^1\times {\mathrm{4157}}^1$

素因数の和:4203

約数の個数: 48

約数和(自身を含む): 50295168

約数和(自身を除く): 29676448

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 80, 124, 155, 160, 248, 310, 496, 620, 992, 1240, 2480, 4157, 4960, 8314, 16628, 20785, 33256, 41570, 66512, 83140, 128867, 133024, 166280, 257734, 332560, 515468, 644335, 665120, 1030936, 1288670, 2061872, 2577340, 4123744, 5154680, 10309360, 20618720]

約数ペア:

[(1, 20618720), (2, 10309360), (4, 5154680), (5, 4123744), (8, 2577340), (10, 2061872), (16, 1288670), (20, 1030936), (31, 665120), (32, 644335), (40, 515468), (62, 332560), (80, 257734), (124, 166280), (155, 133024), (160, 128867), (248, 83140), (310, 66512), (496, 41570), (620, 33256), (992, 20785), (1240, 16628), (2480, 8314), (4157, 4960)]