21627320

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{199}}^1$

素因数の和:253

約数の個数: 128

約数和(自身を含む): 60480000

約数和(自身を除く): 38852680

約数列:

[1, 2, 4, 5, 8, 10, 11, 13, 19, 20, 22, 26, 38, 40, 44, 52, 55, 65, 76, 88, 95, 104, 110, 130, 143, 152, 190, 199, 209, 220, 247, 260, 286, 380, 398, 418, 440, 494, 520, 572, 715, 760, 796, 836, 988, 995, 1045, 1144, 1235, 1430, 1592, 1672, 1976, 1990, 2090, 2189, 2470, 2587, 2717, 2860, 3781, 3980, 4180, 4378, 4940, 5174, 5434, 5720, 7562, 7960, 8360, 8756, 9880, 10348, 10868, 10945, 12935, 13585, 15124, 17512, 18905, 20696, 21736, 21890, 25870, 27170, 28457, 30248, 37810, 41591, 43780, 49153, 51740, 54340, 56914, 75620, 83182, 87560, 98306, 103480, 108680, 113828, 142285, 151240, 166364, 196612, 207955, 227656, 245765, 284570, 332728, 393224, 415910, 491530, 540683, 569140, 831820, 983060, 1081366, 1138280, 1663640, 1966120, 2162732, 2703415, 4325464, 5406830, 10813660, 21627320]

約数ペア:

[(1, 21627320), (2, 10813660), (4, 5406830), (5, 4325464), (8, 2703415), (10, 2162732), (11, 1966120), (13, 1663640), (19, 1138280), (20, 1081366), (22, 983060), (26, 831820), (38, 569140), (40, 540683), (44, 491530), (52, 415910), (55, 393224), (65, 332728), (76, 284570), (88, 245765), (95, 227656), (104, 207955), (110, 196612), (130, 166364), (143, 151240), (152, 142285), (190, 113828), (199, 108680), (209, 103480), (220, 98306), (247, 87560), (260, 83182), (286, 75620), (380, 56914), (398, 54340), (418, 51740), (440, 49153), (494, 43780), (520, 41591), (572, 37810), (715, 30248), (760, 28457), (796, 27170), (836, 25870), (988, 21890), (995, 21736), (1045, 20696), (1144, 18905), (1235, 17512), (1430, 15124), (1592, 13585), (1672, 12935), (1976, 10945), (1990, 10868), (2090, 10348), (2189, 9880), (2470, 8756), (2587, 8360), (2717, 7960), (2860, 7562), (3781, 5720), (3980, 5434), (4180, 5174), (4378, 4940)]