90791720

素因数分解:

$2^3\times 5^1\times {\mathrm{251}}^1\times {\mathrm{9043}}^1$

素因数の和:9305

約数の個数: 32

約数和(自身を含む): 205117920

約数和(自身を除く): 114326200

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 251, 502, 1004, 1255, 2008, 2510, 5020, 9043, 10040, 18086, 36172, 45215, 72344, 90430, 180860, 361720, 2269793, 4539586, 9079172, 11348965, 18158344, 22697930, 45395860, 90791720]

約数ペア:

[(1, 90791720), (2, 45395860), (4, 22697930), (5, 18158344), (8, 11348965), (10, 9079172), (20, 4539586), (40, 2269793), (251, 361720), (502, 180860), (1004, 90430), (1255, 72344), (2008, 45215), (2510, 36172), (5020, 18086), (9043, 10040)]