18670420

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{89}}^1\times {\mathrm{617}}^1$

素因数の和:732

約数の個数: 48

約数和(自身を含む): 42048720

約数和(自身を除く): 23378300

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 89, 170, 178, 340, 356, 445, 617, 890, 1234, 1513, 1780, 2468, 3026, 3085, 6052, 6170, 7565, 10489, 12340, 15130, 20978, 30260, 41956, 52445, 54913, 104890, 109826, 209780, 219652, 274565, 549130, 933521, 1098260, 1867042, 3734084, 4667605, 9335210, 18670420]

約数ペア:

[(1, 18670420), (2, 9335210), (4, 4667605), (5, 3734084), (10, 1867042), (17, 1098260), (20, 933521), (34, 549130), (68, 274565), (85, 219652), (89, 209780), (170, 109826), (178, 104890), (340, 54913), (356, 52445), (445, 41956), (617, 30260), (890, 20978), (1234, 15130), (1513, 12340), (1780, 10489), (2468, 7565), (3026, 6170), (3085, 6052)]