20507120

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{8269}}^1$

素因数の和:8313

約数の個数: 40

約数和(自身を含む): 49223040

約数和(自身を除く): 28715920

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 248, 310, 496, 620, 1240, 2480, 8269, 16538, 33076, 41345, 66152, 82690, 132304, 165380, 256339, 330760, 512678, 661520, 1025356, 1281695, 2050712, 2563390, 4101424, 5126780, 10253560, 20507120]

約数ペア:

[(1, 20507120), (2, 10253560), (4, 5126780), (5, 4101424), (8, 2563390), (10, 2050712), (16, 1281695), (20, 1025356), (31, 661520), (40, 512678), (62, 330760), (80, 256339), (124, 165380), (155, 132304), (248, 82690), (310, 66152), (496, 41345), (620, 33076), (1240, 16538), (2480, 8269)]