21018256

素因数分解:

$2^4\times 7^2\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{83}}^1$

素因数の和:141

約数の個数: 120

約数和(自身を含む): 53434080

約数和(自身を除く): 32415824

約数列:

[1, 2, 4, 7, 8, 14, 16, 17, 19, 28, 34, 38, 49, 56, 68, 76, 83, 98, 112, 119, 133, 136, 152, 166, 196, 238, 266, 272, 304, 323, 332, 392, 476, 532, 581, 646, 664, 784, 833, 931, 952, 1064, 1162, 1292, 1328, 1411, 1577, 1666, 1862, 1904, 2128, 2261, 2324, 2584, 2822, 3154, 3332, 3724, 4067, 4522, 4648, 5168, 5644, 6308, 6664, 7448, 8134, 9044, 9296, 9877, 11039, 11288, 12616, 13328, 14896, 15827, 16268, 18088, 19754, 22078, 22576, 25232, 26809, 31654, 32536, 36176, 39508, 44156, 53618, 63308, 65072, 69139, 77273, 79016, 88312, 107236, 126616, 138278, 154546, 158032, 176624, 187663, 214472, 253232, 276556, 309092, 375326, 428944, 553112, 618184, 750652, 1106224, 1236368, 1313641, 1501304, 2627282, 3002608, 5254564, 10509128, 21018256]

約数ペア:

[(1, 21018256), (2, 10509128), (4, 5254564), (7, 3002608), (8, 2627282), (14, 1501304), (16, 1313641), (17, 1236368), (19, 1106224), (28, 750652), (34, 618184), (38, 553112), (49, 428944), (56, 375326), (68, 309092), (76, 276556), (83, 253232), (98, 214472), (112, 187663), (119, 176624), (133, 158032), (136, 154546), (152, 138278), (166, 126616), (196, 107236), (238, 88312), (266, 79016), (272, 77273), (304, 69139), (323, 65072), (332, 63308), (392, 53618), (476, 44156), (532, 39508), (581, 36176), (646, 32536), (664, 31654), (784, 26809), (833, 25232), (931, 22576), (952, 22078), (1064, 19754), (1162, 18088), (1292, 16268), (1328, 15827), (1411, 14896), (1577, 13328), (1666, 12616), (1862, 11288), (1904, 11039), (2128, 9877), (2261, 9296), (2324, 9044), (2584, 8134), (2822, 7448), (3154, 6664), (3332, 6308), (3724, 5644), (4067, 5168), (4522, 4648)]