20517040

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{8273}}^1$

素因数の和:8317

約数の個数: 40

約数和(自身を含む): 49246848

約数和(自身を除く): 28729808

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 248, 310, 496, 620, 1240, 2480, 8273, 16546, 33092, 41365, 66184, 82730, 132368, 165460, 256463, 330920, 512926, 661840, 1025852, 1282315, 2051704, 2564630, 4103408, 5129260, 10258520, 20517040]

約数ペア:

[(1, 20517040), (2, 10258520), (4, 5129260), (5, 4103408), (8, 2564630), (10, 2051704), (16, 1282315), (20, 1025852), (31, 661840), (40, 512926), (62, 330920), (80, 256463), (124, 165460), (155, 132368), (248, 82730), (310, 66184), (496, 41365), (620, 33092), (1240, 16546), (2480, 8273)]