18638380

素因数分解:

$2^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{89}}^1\times {\mathrm{283}}^1$

素因数の和:418

約数の個数: 48

約数和(自身を含む): 40793760

約数和(自身を除く): 22155380

約数列:

[1, 2, 4, 5, 10, 20, 37, 74, 89, 148, 178, 185, 283, 356, 370, 445, 566, 740, 890, 1132, 1415, 1780, 2830, 3293, 5660, 6586, 10471, 13172, 16465, 20942, 25187, 32930, 41884, 50374, 52355, 65860, 100748, 104710, 125935, 209420, 251870, 503740, 931919, 1863838, 3727676, 4659595, 9319190, 18638380]

約数ペア:

[(1, 18638380), (2, 9319190), (4, 4659595), (5, 3727676), (10, 1863838), (20, 931919), (37, 503740), (74, 251870), (89, 209420), (148, 125935), (178, 104710), (185, 100748), (283, 65860), (356, 52355), (370, 50374), (445, 41884), (566, 32930), (740, 25187), (890, 20942), (1132, 16465), (1415, 13172), (1780, 10471), (2830, 6586), (3293, 5660)]