21164065

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{107}}^1\times {\mathrm{179}}^1$

素因数の和:321

約数の個数: 32

約数和(自身を含む): 29393280

約数和(自身を除く): 8229215

約数列:

[1, 5, 13, 17, 65, 85, 107, 179, 221, 535, 895, 1105, 1391, 1819, 2327, 3043, 6955, 9095, 11635, 15215, 19153, 23647, 39559, 95765, 118235, 197795, 248989, 325601, 1244945, 1628005, 4232813, 21164065]

約数ペア:

[(1, 21164065), (5, 4232813), (13, 1628005), (17, 1244945), (65, 325601), (85, 248989), (107, 197795), (179, 118235), (221, 95765), (535, 39559), (895, 23647), (1105, 19153), (1391, 15215), (1819, 11635), (2327, 9095), (3043, 6955)]