20050480

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{641}}^1$

素因数の和:694

約数の個数: 80

約数和(自身を含む): 51585984

約数和(自身を除く): 31535504

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 23, 34, 40, 46, 68, 80, 85, 92, 115, 136, 170, 184, 230, 272, 340, 368, 391, 460, 641, 680, 782, 920, 1282, 1360, 1564, 1840, 1955, 2564, 3128, 3205, 3910, 5128, 6256, 6410, 7820, 10256, 10897, 12820, 14743, 15640, 21794, 25640, 29486, 31280, 43588, 51280, 54485, 58972, 73715, 87176, 108970, 117944, 147430, 174352, 217940, 235888, 250631, 294860, 435880, 501262, 589720, 871760, 1002524, 1179440, 1253155, 2005048, 2506310, 4010096, 5012620, 10025240, 20050480]

約数ペア:

[(1, 20050480), (2, 10025240), (4, 5012620), (5, 4010096), (8, 2506310), (10, 2005048), (16, 1253155), (17, 1179440), (20, 1002524), (23, 871760), (34, 589720), (40, 501262), (46, 435880), (68, 294860), (80, 250631), (85, 235888), (92, 217940), (115, 174352), (136, 147430), (170, 117944), (184, 108970), (230, 87176), (272, 73715), (340, 58972), (368, 54485), (391, 51280), (460, 43588), (641, 31280), (680, 29486), (782, 25640), (920, 21794), (1282, 15640), (1360, 14743), (1564, 12820), (1840, 10897), (1955, 10256), (2564, 7820), (3128, 6410), (3205, 6256), (3910, 5128)]