20447200

素因数分解:

$2^5\times 5^2\times {\mathrm{61}}^1\times {\mathrm{419}}^1$

素因数の和:500

約数の個数: 72

約数和(自身を含む): 50856120

約数和(自身を除く): 30408920

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 61, 80, 100, 122, 160, 200, 244, 305, 400, 419, 488, 610, 800, 838, 976, 1220, 1525, 1676, 1952, 2095, 2440, 3050, 3352, 4190, 4880, 6100, 6704, 8380, 9760, 10475, 12200, 13408, 16760, 20950, 24400, 25559, 33520, 41900, 48800, 51118, 67040, 83800, 102236, 127795, 167600, 204472, 255590, 335200, 408944, 511180, 638975, 817888, 1022360, 1277950, 2044720, 2555900, 4089440, 5111800, 10223600, 20447200]

約数ペア:

[(1, 20447200), (2, 10223600), (4, 5111800), (5, 4089440), (8, 2555900), (10, 2044720), (16, 1277950), (20, 1022360), (25, 817888), (32, 638975), (40, 511180), (50, 408944), (61, 335200), (80, 255590), (100, 204472), (122, 167600), (160, 127795), (200, 102236), (244, 83800), (305, 67040), (400, 51118), (419, 48800), (488, 41900), (610, 33520), (800, 25559), (838, 24400), (976, 20950), (1220, 16760), (1525, 13408), (1676, 12200), (1952, 10475), (2095, 9760), (2440, 8380), (3050, 6704), (3352, 6100), (4190, 4880)]