18312640

素因数分解:

$2^6\times 5^1\times {\mathrm{89}}^1\times {\mathrm{643}}^1$

素因数の和:749

約数の個数: 56

約数和(自身を含む): 44165520

約数和(自身を除く): 25852880

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 89, 160, 178, 320, 356, 445, 643, 712, 890, 1286, 1424, 1780, 2572, 2848, 3215, 3560, 5144, 5696, 6430, 7120, 10288, 12860, 14240, 20576, 25720, 28480, 41152, 51440, 57227, 102880, 114454, 205760, 228908, 286135, 457816, 572270, 915632, 1144540, 1831264, 2289080, 3662528, 4578160, 9156320, 18312640]

約数ペア:

[(1, 18312640), (2, 9156320), (4, 4578160), (5, 3662528), (8, 2289080), (10, 1831264), (16, 1144540), (20, 915632), (32, 572270), (40, 457816), (64, 286135), (80, 228908), (89, 205760), (160, 114454), (178, 102880), (320, 57227), (356, 51440), (445, 41152), (643, 28480), (712, 25720), (890, 20576), (1286, 14240), (1424, 12860), (1780, 10288), (2572, 7120), (2848, 6430), (3215, 5696), (3560, 5144)]