20780256

素因数分解:

$2^5\times 3^1\times 7^1\times {\mathrm{17}}^2\times {\mathrm{107}}^1$

素因数の和:161

約数の個数: 144

約数和(自身を含む): 66842496

約数和(自身を除く): 46062240

約数列:

[1, 2, 3, 4, 6, 7, 8, 12, 14, 16, 17, 21, 24, 28, 32, 34, 42, 48, 51, 56, 68, 84, 96, 102, 107, 112, 119, 136, 168, 204, 214, 224, 238, 272, 289, 321, 336, 357, 408, 428, 476, 544, 578, 642, 672, 714, 749, 816, 856, 867, 952, 1156, 1284, 1428, 1498, 1632, 1712, 1734, 1819, 1904, 2023, 2247, 2312, 2568, 2856, 2996, 3424, 3468, 3638, 3808, 4046, 4494, 4624, 5136, 5457, 5712, 5992, 6069, 6936, 7276, 8092, 8988, 9248, 10272, 10914, 11424, 11984, 12138, 12733, 13872, 14552, 16184, 17976, 21828, 23968, 24276, 25466, 27744, 29104, 30923, 32368, 35952, 38199, 43656, 48552, 50932, 58208, 61846, 64736, 71904, 76398, 87312, 92769, 97104, 101864, 123692, 152796, 174624, 185538, 194208, 203728, 216461, 247384, 305592, 371076, 407456, 432922, 494768, 611184, 649383, 742152, 865844, 989536, 1222368, 1298766, 1484304, 1731688, 2597532, 2968608, 3463376, 5195064, 6926752, 10390128, 20780256]

約数ペア:

[(1, 20780256), (2, 10390128), (3, 6926752), (4, 5195064), (6, 3463376), (7, 2968608), (8, 2597532), (12, 1731688), (14, 1484304), (16, 1298766), (17, 1222368), (21, 989536), (24, 865844), (28, 742152), (32, 649383), (34, 611184), (42, 494768), (48, 432922), (51, 407456), (56, 371076), (68, 305592), (84, 247384), (96, 216461), (102, 203728), (107, 194208), (112, 185538), (119, 174624), (136, 152796), (168, 123692), (204, 101864), (214, 97104), (224, 92769), (238, 87312), (272, 76398), (289, 71904), (321, 64736), (336, 61846), (357, 58208), (408, 50932), (428, 48552), (476, 43656), (544, 38199), (578, 35952), (642, 32368), (672, 30923), (714, 29104), (749, 27744), (816, 25466), (856, 24276), (867, 23968), (952, 21828), (1156, 17976), (1284, 16184), (1428, 14552), (1498, 13872), (1632, 12733), (1712, 12138), (1734, 11984), (1819, 11424), (1904, 10914), (2023, 10272), (2247, 9248), (2312, 8988), (2568, 8092), (2856, 7276), (2996, 6936), (3424, 6069), (3468, 5992), (3638, 5712), (3808, 5457), (4046, 5136), (4494, 4624)]