20807200

素因数分解:

$2^5\times 5^2\times {\mathrm{31}}^1\times {\mathrm{839}}^1$

素因数の和:890

約数の個数: 72

約数和(自身を含む): 52496640

約数和(自身を除く): 31689440

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 31, 32, 40, 50, 62, 80, 100, 124, 155, 160, 200, 248, 310, 400, 496, 620, 775, 800, 839, 992, 1240, 1550, 1678, 2480, 3100, 3356, 4195, 4960, 6200, 6712, 8390, 12400, 13424, 16780, 20975, 24800, 26009, 26848, 33560, 41950, 52018, 67120, 83900, 104036, 130045, 134240, 167800, 208072, 260090, 335600, 416144, 520180, 650225, 671200, 832288, 1040360, 1300450, 2080720, 2600900, 4161440, 5201800, 10403600, 20807200]

約数ペア:

[(1, 20807200), (2, 10403600), (4, 5201800), (5, 4161440), (8, 2600900), (10, 2080720), (16, 1300450), (20, 1040360), (25, 832288), (31, 671200), (32, 650225), (40, 520180), (50, 416144), (62, 335600), (80, 260090), (100, 208072), (124, 167800), (155, 134240), (160, 130045), (200, 104036), (248, 83900), (310, 67120), (400, 52018), (496, 41950), (620, 33560), (775, 26848), (800, 26009), (839, 24800), (992, 20975), (1240, 16780), (1550, 13424), (1678, 12400), (2480, 8390), (3100, 6712), (3356, 6200), (4195, 4960)]