20058920

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{1009}}^1$

素因数の和:1098

約数の個数: 64

約数和(自身を含む): 52358400

約数和(自身を除く): 32299480

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 71, 140, 142, 280, 284, 355, 497, 568, 710, 994, 1009, 1420, 1988, 2018, 2485, 2840, 3976, 4036, 4970, 5045, 7063, 8072, 9940, 10090, 14126, 19880, 20180, 28252, 35315, 40360, 56504, 70630, 71639, 141260, 143278, 282520, 286556, 358195, 501473, 573112, 716390, 1002946, 1432780, 2005892, 2507365, 2865560, 4011784, 5014730, 10029460, 20058920]

約数ペア:

[(1, 20058920), (2, 10029460), (4, 5014730), (5, 4011784), (7, 2865560), (8, 2507365), (10, 2005892), (14, 1432780), (20, 1002946), (28, 716390), (35, 573112), (40, 501473), (56, 358195), (70, 286556), (71, 282520), (140, 143278), (142, 141260), (280, 71639), (284, 70630), (355, 56504), (497, 40360), (568, 35315), (710, 28252), (994, 20180), (1009, 19880), (1420, 14126), (1988, 10090), (2018, 9940), (2485, 8072), (2840, 7063), (3976, 5045), (4036, 4970)]