20967664

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{157}}^1\times {\mathrm{491}}^1$

素因数の和:673

約数の個数: 40

約数和(自身を含む): 43376688

約数和(自身を除く): 22409024

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 136, 157, 272, 314, 491, 628, 982, 1256, 1964, 2512, 2669, 3928, 5338, 7856, 8347, 10676, 16694, 21352, 33388, 42704, 66776, 77087, 133552, 154174, 308348, 616696, 1233392, 1310479, 2620958, 5241916, 10483832, 20967664]

約数ペア:

[(1, 20967664), (2, 10483832), (4, 5241916), (8, 2620958), (16, 1310479), (17, 1233392), (34, 616696), (68, 308348), (136, 154174), (157, 133552), (272, 77087), (314, 66776), (491, 42704), (628, 33388), (982, 21352), (1256, 16694), (1964, 10676), (2512, 8347), (2669, 7856), (3928, 5338)]