28121520

素因数分解:

$2^4\times 3^1\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{881}}^1$

素因数の和:923

約数の個数: 160

約数和(自身を含む): 104993280

約数和(自身を除く): 76871760

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 19, 20, 21, 24, 28, 30, 35, 38, 40, 42, 48, 56, 57, 60, 70, 76, 80, 84, 95, 105, 112, 114, 120, 133, 140, 152, 168, 190, 210, 228, 240, 266, 280, 285, 304, 336, 380, 399, 420, 456, 532, 560, 570, 665, 760, 798, 840, 881, 912, 1064, 1140, 1330, 1520, 1596, 1680, 1762, 1995, 2128, 2280, 2643, 2660, 3192, 3524, 3990, 4405, 4560, 5286, 5320, 6167, 6384, 7048, 7980, 8810, 10572, 10640, 12334, 13215, 14096, 15960, 16739, 17620, 18501, 21144, 24668, 26430, 30835, 31920, 33478, 35240, 37002, 42288, 49336, 50217, 52860, 61670, 66956, 70480, 74004, 83695, 92505, 98672, 100434, 105720, 117173, 123340, 133912, 148008, 167390, 185010, 200868, 211440, 234346, 246680, 251085, 267824, 296016, 334780, 351519, 370020, 401736, 468692, 493360, 502170, 585865, 669560, 703038, 740040, 803472, 937384, 1004340, 1171730, 1339120, 1406076, 1480080, 1757595, 1874768, 2008680, 2343460, 2812152, 3515190, 4017360, 4686920, 5624304, 7030380, 9373840, 14060760, 28121520]

約数ペア:

[(1, 28121520), (2, 14060760), (3, 9373840), (4, 7030380), (5, 5624304), (6, 4686920), (7, 4017360), (8, 3515190), (10, 2812152), (12, 2343460), (14, 2008680), (15, 1874768), (16, 1757595), (19, 1480080), (20, 1406076), (21, 1339120), (24, 1171730), (28, 1004340), (30, 937384), (35, 803472), (38, 740040), (40, 703038), (42, 669560), (48, 585865), (56, 502170), (57, 493360), (60, 468692), (70, 401736), (76, 370020), (80, 351519), (84, 334780), (95, 296016), (105, 267824), (112, 251085), (114, 246680), (120, 234346), (133, 211440), (140, 200868), (152, 185010), (168, 167390), (190, 148008), (210, 133912), (228, 123340), (240, 117173), (266, 105720), (280, 100434), (285, 98672), (304, 92505), (336, 83695), (380, 74004), (399, 70480), (420, 66956), (456, 61670), (532, 52860), (560, 50217), (570, 49336), (665, 42288), (760, 37002), (798, 35240), (840, 33478), (881, 31920), (912, 30835), (1064, 26430), (1140, 24668), (1330, 21144), (1520, 18501), (1596, 17620), (1680, 16739), (1762, 15960), (1995, 14096), (2128, 13215), (2280, 12334), (2643, 10640), (2660, 10572), (3192, 8810), (3524, 7980), (3990, 7048), (4405, 6384), (4560, 6167), (5286, 5320)]