20121680

素因数分解:

$2^4\times 5^1\times {\mathrm{97}}^1\times {\mathrm{2593}}^1$

素因数の和:2703

約数の個数: 40

約数和(自身を含む): 47283432

約数和(自身を除く): 27161752

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 97, 194, 388, 485, 776, 970, 1552, 1940, 2593, 3880, 5186, 7760, 10372, 12965, 20744, 25930, 41488, 51860, 103720, 207440, 251521, 503042, 1006084, 1257605, 2012168, 2515210, 4024336, 5030420, 10060840, 20121680]

約数ペア:

[(1, 20121680), (2, 10060840), (4, 5030420), (5, 4024336), (8, 2515210), (10, 2012168), (16, 1257605), (20, 1006084), (40, 503042), (80, 251521), (97, 207440), (194, 103720), (388, 51860), (485, 41488), (776, 25930), (970, 20744), (1552, 12965), (1940, 10372), (2593, 7760), (3880, 5186)]