20534440

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{659}}^1$

素因数の和:730

約数の個数: 64

約数和(自身を含む): 49896000

約数和(自身を除く): 29361560

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 41, 76, 82, 95, 152, 164, 190, 205, 328, 380, 410, 659, 760, 779, 820, 1318, 1558, 1640, 2636, 3116, 3295, 3895, 5272, 6232, 6590, 7790, 12521, 13180, 15580, 25042, 26360, 27019, 31160, 50084, 54038, 62605, 100168, 108076, 125210, 135095, 216152, 250420, 270190, 500840, 513361, 540380, 1026722, 1080760, 2053444, 2566805, 4106888, 5133610, 10267220, 20534440]

約数ペア:

[(1, 20534440), (2, 10267220), (4, 5133610), (5, 4106888), (8, 2566805), (10, 2053444), (19, 1080760), (20, 1026722), (38, 540380), (40, 513361), (41, 500840), (76, 270190), (82, 250420), (95, 216152), (152, 135095), (164, 125210), (190, 108076), (205, 100168), (328, 62605), (380, 54038), (410, 50084), (659, 31160), (760, 27019), (779, 26360), (820, 25042), (1318, 15580), (1558, 13180), (1640, 12521), (2636, 7790), (3116, 6590), (3295, 6232), (3895, 5272)]