20485360

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{157}}^1\times {\mathrm{233}}^1$

素因数の和:410

約数の個数: 80

約数和(自身を含む): 55014336

約数和(自身を除く): 34528976

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 157, 233, 280, 314, 466, 560, 628, 785, 932, 1099, 1165, 1256, 1570, 1631, 1864, 2198, 2330, 2512, 3140, 3262, 3728, 4396, 4660, 5495, 6280, 6524, 8155, 8792, 9320, 10990, 12560, 13048, 16310, 17584, 18640, 21980, 26096, 32620, 36581, 43960, 65240, 73162, 87920, 130480, 146324, 182905, 256067, 292648, 365810, 512134, 585296, 731620, 1024268, 1280335, 1463240, 2048536, 2560670, 2926480, 4097072, 5121340, 10242680, 20485360]

約数ペア:

[(1, 20485360), (2, 10242680), (4, 5121340), (5, 4097072), (7, 2926480), (8, 2560670), (10, 2048536), (14, 1463240), (16, 1280335), (20, 1024268), (28, 731620), (35, 585296), (40, 512134), (56, 365810), (70, 292648), (80, 256067), (112, 182905), (140, 146324), (157, 130480), (233, 87920), (280, 73162), (314, 65240), (466, 43960), (560, 36581), (628, 32620), (785, 26096), (932, 21980), (1099, 18640), (1165, 17584), (1256, 16310), (1570, 13048), (1631, 12560), (1864, 10990), (2198, 9320), (2330, 8792), (2512, 8155), (3140, 6524), (3262, 6280), (3728, 5495), (4396, 4660)]