21005880

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{1471}}^1$

素因数の和:1509

約数の個数: 128

約数和(自身を含む): 76308480

約数和(自身を除く): 55302600

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 17, 20, 21, 24, 28, 30, 34, 35, 40, 42, 51, 56, 60, 68, 70, 84, 85, 102, 105, 119, 120, 136, 140, 168, 170, 204, 210, 238, 255, 280, 340, 357, 408, 420, 476, 510, 595, 680, 714, 840, 952, 1020, 1190, 1428, 1471, 1785, 2040, 2380, 2856, 2942, 3570, 4413, 4760, 5884, 7140, 7355, 8826, 10297, 11768, 14280, 14710, 17652, 20594, 22065, 25007, 29420, 30891, 35304, 41188, 44130, 50014, 51485, 58840, 61782, 75021, 82376, 88260, 100028, 102970, 123564, 125035, 150042, 154455, 175049, 176520, 200056, 205940, 247128, 250070, 300084, 308910, 350098, 375105, 411880, 500140, 525147, 600168, 617820, 700196, 750210, 875245, 1000280, 1050294, 1235640, 1400392, 1500420, 1750490, 2100588, 2625735, 3000840, 3500980, 4201176, 5251470, 7001960, 10502940, 21005880]

約数ペア:

[(1, 21005880), (2, 10502940), (3, 7001960), (4, 5251470), (5, 4201176), (6, 3500980), (7, 3000840), (8, 2625735), (10, 2100588), (12, 1750490), (14, 1500420), (15, 1400392), (17, 1235640), (20, 1050294), (21, 1000280), (24, 875245), (28, 750210), (30, 700196), (34, 617820), (35, 600168), (40, 525147), (42, 500140), (51, 411880), (56, 375105), (60, 350098), (68, 308910), (70, 300084), (84, 250070), (85, 247128), (102, 205940), (105, 200056), (119, 176520), (120, 175049), (136, 154455), (140, 150042), (168, 125035), (170, 123564), (204, 102970), (210, 100028), (238, 88260), (255, 82376), (280, 75021), (340, 61782), (357, 58840), (408, 51485), (420, 50014), (476, 44130), (510, 41188), (595, 35304), (680, 30891), (714, 29420), (840, 25007), (952, 22065), (1020, 20594), (1190, 17652), (1428, 14710), (1471, 14280), (1785, 11768), (2040, 10297), (2380, 8826), (2856, 7355), (2942, 7140), (3570, 5884), (4413, 4760)]