217871565

素因数分解:

$3^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{7681}}^1$

素因数の和:7781

約数の個数: 32

約数和(自身を含む): 365786112

約数和(自身を除く): 147914547

約数列:

[1, 3, 5, 15, 31, 61, 93, 155, 183, 305, 465, 915, 1891, 5673, 7681, 9455, 23043, 28365, 38405, 115215, 238111, 468541, 714333, 1190555, 1405623, 2342705, 3571665, 7028115, 14524771, 43574313, 72623855, 217871565]

約数ペア:

[(1, 217871565), (3, 72623855), (5, 43574313), (15, 14524771), (31, 7028115), (61, 3571665), (93, 2342705), (155, 1405623), (183, 1190555), (305, 714333), (465, 468541), (915, 238111), (1891, 115215), (5673, 38405), (7681, 28365), (9455, 23043)]