21000663520

素因数分解:

$2^5\times 5^1\times {\mathrm{19}}^1\times {\mathrm{911}}^1\times {\mathrm{7583}}^1$

素因数の和:8528

約数の個数: 96

約数和(自身を含む): 52289556480

約数和(自身を除く): 31288892960

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 32, 38, 40, 76, 80, 95, 152, 160, 190, 304, 380, 608, 760, 911, 1520, 1822, 3040, 3644, 4555, 7288, 7583, 9110, 14576, 15166, 17309, 18220, 29152, 30332, 34618, 36440, 37915, 60664, 69236, 72880, 75830, 86545, 121328, 138472, 144077, 145760, 151660, 173090, 242656, 276944, 288154, 303320, 346180, 553888, 576308, 606640, 692360, 720385, 1152616, 1213280, 1384720, 1440770, 2305232, 2769440, 2881540, 4610464, 5763080, 6908113, 11526160, 13816226, 23052320, 27632452, 34540565, 55264904, 69081130, 110529808, 131254147, 138162260, 221059616, 262508294, 276324520, 525016588, 552649040, 656270735, 1050033176, 1105298080, 1312541470, 2100066352, 2625082940, 4200132704, 5250165880, 10500331760, 21000663520]

約数ペア:

[(1, 21000663520), (2, 10500331760), (4, 5250165880), (5, 4200132704), (8, 2625082940), (10, 2100066352), (16, 1312541470), (19, 1105298080), (20, 1050033176), (32, 656270735), (38, 552649040), (40, 525016588), (76, 276324520), (80, 262508294), (95, 221059616), (152, 138162260), (160, 131254147), (190, 110529808), (304, 69081130), (380, 55264904), (608, 34540565), (760, 27632452), (911, 23052320), (1520, 13816226), (1822, 11526160), (3040, 6908113), (3644, 5763080), (4555, 4610464), (7288, 2881540), (7583, 2769440), (9110, 2305232), (14576, 1440770), (15166, 1384720), (17309, 1213280), (18220, 1152616), (29152, 720385), (30332, 692360), (34618, 606640), (36440, 576308), (37915, 553888), (60664, 346180), (69236, 303320), (72880, 288154), (75830, 276944), (86545, 242656), (121328, 173090), (138472, 151660), (144077, 145760)]