21240240

素因数分解:

$2^4\times 3^1\times 5^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{269}}^1$

素因数の和:339

約数の個数: 160

約数和(自身を含む): 77137920

約数和(自身を除く): 55897680

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 20, 21, 24, 28, 30, 35, 40, 42, 47, 48, 56, 60, 70, 80, 84, 94, 105, 112, 120, 140, 141, 168, 188, 210, 235, 240, 269, 280, 282, 329, 336, 376, 420, 470, 538, 560, 564, 658, 705, 752, 807, 840, 940, 987, 1076, 1128, 1316, 1345, 1410, 1614, 1645, 1680, 1880, 1883, 1974, 2152, 2256, 2632, 2690, 2820, 3228, 3290, 3760, 3766, 3948, 4035, 4304, 4935, 5264, 5380, 5640, 5649, 6456, 6580, 7532, 7896, 8070, 9415, 9870, 10760, 11280, 11298, 12643, 12912, 13160, 15064, 15792, 16140, 18830, 19740, 21520, 22596, 25286, 26320, 28245, 30128, 32280, 37660, 37929, 39480, 45192, 50572, 56490, 63215, 64560, 75320, 75858, 78960, 88501, 90384, 101144, 112980, 126430, 150640, 151716, 177002, 189645, 202288, 225960, 252860, 265503, 303432, 354004, 379290, 442505, 451920, 505720, 531006, 606864, 708008, 758580, 885010, 1011440, 1062012, 1327515, 1416016, 1517160, 1770020, 2124024, 2655030, 3034320, 3540040, 4248048, 5310060, 7080080, 10620120, 21240240]

約数ペア:

[(1, 21240240), (2, 10620120), (3, 7080080), (4, 5310060), (5, 4248048), (6, 3540040), (7, 3034320), (8, 2655030), (10, 2124024), (12, 1770020), (14, 1517160), (15, 1416016), (16, 1327515), (20, 1062012), (21, 1011440), (24, 885010), (28, 758580), (30, 708008), (35, 606864), (40, 531006), (42, 505720), (47, 451920), (48, 442505), (56, 379290), (60, 354004), (70, 303432), (80, 265503), (84, 252860), (94, 225960), (105, 202288), (112, 189645), (120, 177002), (140, 151716), (141, 150640), (168, 126430), (188, 112980), (210, 101144), (235, 90384), (240, 88501), (269, 78960), (280, 75858), (282, 75320), (329, 64560), (336, 63215), (376, 56490), (420, 50572), (470, 45192), (538, 39480), (560, 37929), (564, 37660), (658, 32280), (705, 30128), (752, 28245), (807, 26320), (840, 25286), (940, 22596), (987, 21520), (1076, 19740), (1128, 18830), (1316, 16140), (1345, 15792), (1410, 15064), (1614, 13160), (1645, 12912), (1680, 12643), (1880, 11298), (1883, 11280), (1974, 10760), (2152, 9870), (2256, 9415), (2632, 8070), (2690, 7896), (2820, 7532), (3228, 6580), (3290, 6456), (3760, 5649), (3766, 5640), (3948, 5380), (4035, 5264), (4304, 4935)]