20715640

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^2\times {\mathrm{89}}^1$

素因数の和:157

約数の個数: 96

約数和(自身を含む): 53751600

約数和(自身を除く): 33035960

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 23, 40, 44, 46, 55, 88, 89, 92, 110, 115, 178, 184, 220, 230, 253, 356, 440, 445, 460, 506, 529, 712, 890, 920, 979, 1012, 1058, 1265, 1780, 1958, 2024, 2047, 2116, 2530, 2645, 3560, 3916, 4094, 4232, 4895, 5060, 5290, 5819, 7832, 8188, 9790, 10120, 10235, 10580, 11638, 16376, 19580, 20470, 21160, 22517, 23276, 29095, 39160, 40940, 45034, 46552, 47081, 58190, 81880, 90068, 94162, 112585, 116380, 180136, 188324, 225170, 232760, 235405, 376648, 450340, 470810, 517891, 900680, 941620, 1035782, 1883240, 2071564, 2589455, 4143128, 5178910, 10357820, 20715640]

約数ペア:

[(1, 20715640), (2, 10357820), (4, 5178910), (5, 4143128), (8, 2589455), (10, 2071564), (11, 1883240), (20, 1035782), (22, 941620), (23, 900680), (40, 517891), (44, 470810), (46, 450340), (55, 376648), (88, 235405), (89, 232760), (92, 225170), (110, 188324), (115, 180136), (178, 116380), (184, 112585), (220, 94162), (230, 90068), (253, 81880), (356, 58190), (440, 47081), (445, 46552), (460, 45034), (506, 40940), (529, 39160), (712, 29095), (890, 23276), (920, 22517), (979, 21160), (1012, 20470), (1058, 19580), (1265, 16376), (1780, 11638), (1958, 10580), (2024, 10235), (2047, 10120), (2116, 9790), (2530, 8188), (2645, 7832), (3560, 5819), (3916, 5290), (4094, 5060), (4232, 4895)]