21255304

素因数分解:

$2^3\times 7^1\times {\mathrm{17}}^1\times {\mathrm{83}}^1\times {\mathrm{269}}^1$

素因数の和:382

約数の個数: 64

約数和(自身を含む): 48988800

約数和(自身を除く): 27733496

約数列:

[1, 2, 4, 7, 8, 14, 17, 28, 34, 56, 68, 83, 119, 136, 166, 238, 269, 332, 476, 538, 581, 664, 952, 1076, 1162, 1411, 1883, 2152, 2324, 2822, 3766, 4573, 4648, 5644, 7532, 9146, 9877, 11288, 15064, 18292, 19754, 22327, 32011, 36584, 39508, 44654, 64022, 79016, 89308, 128044, 156289, 178616, 256088, 312578, 379559, 625156, 759118, 1250312, 1518236, 2656913, 3036472, 5313826, 10627652, 21255304]

約数ペア:

[(1, 21255304), (2, 10627652), (4, 5313826), (7, 3036472), (8, 2656913), (14, 1518236), (17, 1250312), (28, 759118), (34, 625156), (56, 379559), (68, 312578), (83, 256088), (119, 178616), (136, 156289), (166, 128044), (238, 89308), (269, 79016), (332, 64022), (476, 44654), (538, 39508), (581, 36584), (664, 32011), (952, 22327), (1076, 19754), (1162, 18292), (1411, 15064), (1883, 11288), (2152, 9877), (2324, 9146), (2822, 7532), (3766, 5644), (4573, 4648)]