21113728

素因数分解:

$2^7\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{313}}^1$

素因数の和:375

約数の個数: 64

約数和(自身を含む): 46120320

約数和(自身を除く): 25006592

約数列:

[1, 2, 4, 8, 16, 17, 31, 32, 34, 62, 64, 68, 124, 128, 136, 248, 272, 313, 496, 527, 544, 626, 992, 1054, 1088, 1252, 1984, 2108, 2176, 2504, 3968, 4216, 5008, 5321, 8432, 9703, 10016, 10642, 16864, 19406, 20032, 21284, 33728, 38812, 40064, 42568, 67456, 77624, 85136, 155248, 164951, 170272, 310496, 329902, 340544, 620992, 659804, 681088, 1241984, 1319608, 2639216, 5278432, 10556864, 21113728]

約数ペア:

[(1, 21113728), (2, 10556864), (4, 5278432), (8, 2639216), (16, 1319608), (17, 1241984), (31, 681088), (32, 659804), (34, 620992), (62, 340544), (64, 329902), (68, 310496), (124, 170272), (128, 164951), (136, 155248), (248, 85136), (272, 77624), (313, 67456), (496, 42568), (527, 40064), (544, 38812), (626, 33728), (992, 21284), (1054, 20032), (1088, 19406), (1252, 16864), (1984, 10642), (2108, 10016), (2176, 9703), (2504, 8432), (3968, 5321), (4216, 5008)]