21789040

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{73}}^1$

素因数の和:147

約数の個数: 160

約数和(自身を含む): 64745856

約数和(自身を除く): 42956816

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 16, 20, 26, 28, 35, 40, 41, 52, 56, 65, 70, 73, 80, 82, 91, 104, 112, 130, 140, 146, 164, 182, 205, 208, 260, 280, 287, 292, 328, 364, 365, 410, 455, 511, 520, 533, 560, 574, 584, 656, 728, 730, 820, 910, 949, 1022, 1040, 1066, 1148, 1168, 1435, 1456, 1460, 1640, 1820, 1898, 2044, 2132, 2296, 2555, 2665, 2870, 2920, 2993, 3280, 3640, 3731, 3796, 4088, 4264, 4592, 4745, 5110, 5330, 5740, 5840, 5986, 6643, 7280, 7462, 7592, 8176, 8528, 9490, 10220, 10660, 11480, 11972, 13286, 14924, 14965, 15184, 18655, 18980, 20440, 20951, 21320, 22960, 23944, 26572, 29848, 29930, 33215, 37310, 37960, 38909, 40880, 41902, 42640, 47888, 53144, 59696, 59860, 66430, 74620, 75920, 77818, 83804, 104755, 106288, 119720, 132860, 149240, 155636, 167608, 194545, 209510, 239440, 265720, 272363, 298480, 311272, 335216, 389090, 419020, 531440, 544726, 622544, 778180, 838040, 1089452, 1361815, 1556360, 1676080, 2178904, 2723630, 3112720, 4357808, 5447260, 10894520, 21789040]

約数ペア:

[(1, 21789040), (2, 10894520), (4, 5447260), (5, 4357808), (7, 3112720), (8, 2723630), (10, 2178904), (13, 1676080), (14, 1556360), (16, 1361815), (20, 1089452), (26, 838040), (28, 778180), (35, 622544), (40, 544726), (41, 531440), (52, 419020), (56, 389090), (65, 335216), (70, 311272), (73, 298480), (80, 272363), (82, 265720), (91, 239440), (104, 209510), (112, 194545), (130, 167608), (140, 155636), (146, 149240), (164, 132860), (182, 119720), (205, 106288), (208, 104755), (260, 83804), (280, 77818), (287, 75920), (292, 74620), (328, 66430), (364, 59860), (365, 59696), (410, 53144), (455, 47888), (511, 42640), (520, 41902), (533, 40880), (560, 38909), (574, 37960), (584, 37310), (656, 33215), (728, 29930), (730, 29848), (820, 26572), (910, 23944), (949, 22960), (1022, 21320), (1040, 20951), (1066, 20440), (1148, 18980), (1168, 18655), (1435, 15184), (1456, 14965), (1460, 14924), (1640, 13286), (1820, 11972), (1898, 11480), (2044, 10660), (2132, 10220), (2296, 9490), (2555, 8528), (2665, 8176), (2870, 7592), (2920, 7462), (2993, 7280), (3280, 6643), (3640, 5986), (3731, 5840), (3796, 5740), (4088, 5330), (4264, 5110), (4592, 4745)]