21508600

素因数分解:

$2^3\times 5^2\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{61}}^1$

素因数の和:161

約数の個数: 96

約数和(自身を含む): 53277840

約数和(自身を除く): 31769240

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 41, 43, 50, 61, 82, 86, 100, 122, 164, 172, 200, 205, 215, 244, 305, 328, 344, 410, 430, 488, 610, 820, 860, 1025, 1075, 1220, 1525, 1640, 1720, 1763, 2050, 2150, 2440, 2501, 2623, 3050, 3526, 4100, 4300, 5002, 5246, 6100, 7052, 8200, 8600, 8815, 10004, 10492, 12200, 12505, 13115, 14104, 17630, 20008, 20984, 25010, 26230, 35260, 44075, 50020, 52460, 62525, 65575, 70520, 88150, 100040, 104920, 107543, 125050, 131150, 176300, 215086, 250100, 262300, 352600, 430172, 500200, 524600, 537715, 860344, 1075430, 2150860, 2688575, 4301720, 5377150, 10754300, 21508600]

約数ペア:

[(1, 21508600), (2, 10754300), (4, 5377150), (5, 4301720), (8, 2688575), (10, 2150860), (20, 1075430), (25, 860344), (40, 537715), (41, 524600), (43, 500200), (50, 430172), (61, 352600), (82, 262300), (86, 250100), (100, 215086), (122, 176300), (164, 131150), (172, 125050), (200, 107543), (205, 104920), (215, 100040), (244, 88150), (305, 70520), (328, 65575), (344, 62525), (410, 52460), (430, 50020), (488, 44075), (610, 35260), (820, 26230), (860, 25010), (1025, 20984), (1075, 20008), (1220, 17630), (1525, 14104), (1640, 13115), (1720, 12505), (1763, 12200), (2050, 10492), (2150, 10004), (2440, 8815), (2501, 8600), (2623, 8200), (3050, 7052), (3526, 6100), (4100, 5246), (4300, 5002)]