21805920

素因数分解:

$2^5\times 3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{797}}^1$

素因数の和:837

約数の個数: 144

約数和(自身を含む): 78427440

約数和(自身を除く): 56621520

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 19, 20, 24, 30, 32, 36, 38, 40, 45, 48, 57, 60, 72, 76, 80, 90, 95, 96, 114, 120, 144, 152, 160, 171, 180, 190, 228, 240, 285, 288, 304, 342, 360, 380, 456, 480, 570, 608, 684, 720, 760, 797, 855, 912, 1140, 1368, 1440, 1520, 1594, 1710, 1824, 2280, 2391, 2736, 3040, 3188, 3420, 3985, 4560, 4782, 5472, 6376, 6840, 7173, 7970, 9120, 9564, 11955, 12752, 13680, 14346, 15143, 15940, 19128, 23910, 25504, 27360, 28692, 30286, 31880, 35865, 38256, 45429, 47820, 57384, 60572, 63760, 71730, 75715, 76512, 90858, 95640, 114768, 121144, 127520, 136287, 143460, 151430, 181716, 191280, 227145, 229536, 242288, 272574, 286920, 302860, 363432, 382560, 454290, 484576, 545148, 573840, 605720, 681435, 726864, 908580, 1090296, 1147680, 1211440, 1362870, 1453728, 1817160, 2180592, 2422880, 2725740, 3634320, 4361184, 5451480, 7268640, 10902960, 21805920]

約数ペア:

[(1, 21805920), (2, 10902960), (3, 7268640), (4, 5451480), (5, 4361184), (6, 3634320), (8, 2725740), (9, 2422880), (10, 2180592), (12, 1817160), (15, 1453728), (16, 1362870), (18, 1211440), (19, 1147680), (20, 1090296), (24, 908580), (30, 726864), (32, 681435), (36, 605720), (38, 573840), (40, 545148), (45, 484576), (48, 454290), (57, 382560), (60, 363432), (72, 302860), (76, 286920), (80, 272574), (90, 242288), (95, 229536), (96, 227145), (114, 191280), (120, 181716), (144, 151430), (152, 143460), (160, 136287), (171, 127520), (180, 121144), (190, 114768), (228, 95640), (240, 90858), (285, 76512), (288, 75715), (304, 71730), (342, 63760), (360, 60572), (380, 57384), (456, 47820), (480, 45429), (570, 38256), (608, 35865), (684, 31880), (720, 30286), (760, 28692), (797, 27360), (855, 25504), (912, 23910), (1140, 19128), (1368, 15940), (1440, 15143), (1520, 14346), (1594, 13680), (1710, 12752), (1824, 11955), (2280, 9564), (2391, 9120), (2736, 7970), (3040, 7173), (3188, 6840), (3420, 6376), (3985, 5472), (4560, 4782)]