21215235

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{271}}^1\times {\mathrm{307}}^1$

素因数の和:603

約数の個数: 32

約数和(自身を含む): 36191232

約数和(自身を除く): 14975997

約数列:

[1, 3, 5, 15, 17, 51, 85, 255, 271, 307, 813, 921, 1355, 1535, 4065, 4605, 4607, 5219, 13821, 15657, 23035, 26095, 69105, 78285, 83197, 249591, 415985, 1247955, 1414349, 4243047, 7071745, 21215235]

約数ペア:

[(1, 21215235), (3, 7071745), (5, 4243047), (15, 1414349), (17, 1247955), (51, 415985), (85, 249591), (255, 83197), (271, 78285), (307, 69105), (813, 26095), (921, 23035), (1355, 15657), (1535, 13821), (4065, 5219), (4605, 4607)]