28439840

素因数分解:

$2^5\times 5^1\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{113}}^1$

素因数の和:163

約数の個数: 144

約数和(自身を含む): 80237304

約数和(自身を除く): 51797464

約数列:

[1, 2, 4, 5, 8, 10, 11, 13, 16, 20, 22, 26, 32, 40, 44, 52, 55, 65, 80, 88, 104, 110, 113, 121, 130, 143, 160, 176, 208, 220, 226, 242, 260, 286, 352, 416, 440, 452, 484, 520, 565, 572, 605, 715, 880, 904, 968, 1040, 1130, 1144, 1210, 1243, 1430, 1469, 1573, 1760, 1808, 1936, 2080, 2260, 2288, 2420, 2486, 2860, 2938, 3146, 3616, 3872, 4520, 4576, 4840, 4972, 5720, 5876, 6215, 6292, 7345, 7865, 9040, 9680, 9944, 11440, 11752, 12430, 12584, 13673, 14690, 15730, 16159, 18080, 19360, 19888, 22880, 23504, 24860, 25168, 27346, 29380, 31460, 32318, 39776, 47008, 49720, 50336, 54692, 58760, 62920, 64636, 68365, 80795, 99440, 109384, 117520, 125840, 129272, 136730, 161590, 177749, 198880, 218768, 235040, 251680, 258544, 273460, 323180, 355498, 437536, 517088, 546920, 646360, 710996, 888745, 1093840, 1292720, 1421992, 1777490, 2187680, 2585440, 2843984, 3554980, 5687968, 7109960, 14219920, 28439840]

約数ペア:

[(1, 28439840), (2, 14219920), (4, 7109960), (5, 5687968), (8, 3554980), (10, 2843984), (11, 2585440), (13, 2187680), (16, 1777490), (20, 1421992), (22, 1292720), (26, 1093840), (32, 888745), (40, 710996), (44, 646360), (52, 546920), (55, 517088), (65, 437536), (80, 355498), (88, 323180), (104, 273460), (110, 258544), (113, 251680), (121, 235040), (130, 218768), (143, 198880), (160, 177749), (176, 161590), (208, 136730), (220, 129272), (226, 125840), (242, 117520), (260, 109384), (286, 99440), (352, 80795), (416, 68365), (440, 64636), (452, 62920), (484, 58760), (520, 54692), (565, 50336), (572, 49720), (605, 47008), (715, 39776), (880, 32318), (904, 31460), (968, 29380), (1040, 27346), (1130, 25168), (1144, 24860), (1210, 23504), (1243, 22880), (1430, 19888), (1469, 19360), (1573, 18080), (1760, 16159), (1808, 15730), (1936, 14690), (2080, 13673), (2260, 12584), (2288, 12430), (2420, 11752), (2486, 11440), (2860, 9944), (2938, 9680), (3146, 9040), (3616, 7865), (3872, 7345), (4520, 6292), (4576, 6215), (4840, 5876), (4972, 5720)]