20637960

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{79}}^1\times {\mathrm{311}}^1$

素因数の和:411

約数の個数: 128

約数和(自身を含む): 71884800

約数和(自身を除く): 51246840

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 79, 84, 105, 120, 140, 158, 168, 210, 237, 280, 311, 316, 395, 420, 474, 553, 622, 632, 790, 840, 933, 948, 1106, 1185, 1244, 1555, 1580, 1659, 1866, 1896, 2177, 2212, 2370, 2488, 2765, 3110, 3160, 3318, 3732, 4354, 4424, 4665, 4740, 5530, 6220, 6531, 6636, 7464, 8295, 8708, 9330, 9480, 10885, 11060, 12440, 13062, 13272, 16590, 17416, 18660, 21770, 22120, 24569, 26124, 32655, 33180, 37320, 43540, 49138, 52248, 65310, 66360, 73707, 87080, 98276, 122845, 130620, 147414, 171983, 196552, 245690, 261240, 294828, 343966, 368535, 491380, 515949, 589656, 687932, 737070, 859915, 982760, 1031898, 1375864, 1474140, 1719830, 2063796, 2579745, 2948280, 3439660, 4127592, 5159490, 6879320, 10318980, 20637960]

約数ペア:

[(1, 20637960), (2, 10318980), (3, 6879320), (4, 5159490), (5, 4127592), (6, 3439660), (7, 2948280), (8, 2579745), (10, 2063796), (12, 1719830), (14, 1474140), (15, 1375864), (20, 1031898), (21, 982760), (24, 859915), (28, 737070), (30, 687932), (35, 589656), (40, 515949), (42, 491380), (56, 368535), (60, 343966), (70, 294828), (79, 261240), (84, 245690), (105, 196552), (120, 171983), (140, 147414), (158, 130620), (168, 122845), (210, 98276), (237, 87080), (280, 73707), (311, 66360), (316, 65310), (395, 52248), (420, 49138), (474, 43540), (553, 37320), (622, 33180), (632, 32655), (790, 26124), (840, 24569), (933, 22120), (948, 21770), (1106, 18660), (1185, 17416), (1244, 16590), (1555, 13272), (1580, 13062), (1659, 12440), (1866, 11060), (1896, 10885), (2177, 9480), (2212, 9330), (2370, 8708), (2488, 8295), (2765, 7464), (3110, 6636), (3160, 6531), (3318, 6220), (3732, 5530), (4354, 4740), (4424, 4665)]