20391440

素因数分解:

$2^4\times 5^1\times {\mathrm{37}}^1\times {\mathrm{83}}^2$

素因数の和:216

約数の個数: 60

約数和(自身を含む): 49285164

約数和(自身を除く): 28893724

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 37, 40, 74, 80, 83, 148, 166, 185, 296, 332, 370, 415, 592, 664, 740, 830, 1328, 1480, 1660, 2960, 3071, 3320, 6142, 6640, 6889, 12284, 13778, 15355, 24568, 27556, 30710, 34445, 49136, 55112, 61420, 68890, 110224, 122840, 137780, 245680, 254893, 275560, 509786, 551120, 1019572, 1274465, 2039144, 2548930, 4078288, 5097860, 10195720, 20391440]

約数ペア:

[(1, 20391440), (2, 10195720), (4, 5097860), (5, 4078288), (8, 2548930), (10, 2039144), (16, 1274465), (20, 1019572), (37, 551120), (40, 509786), (74, 275560), (80, 254893), (83, 245680), (148, 137780), (166, 122840), (185, 110224), (296, 68890), (332, 61420), (370, 55112), (415, 49136), (592, 34445), (664, 30710), (740, 27556), (830, 24568), (1328, 15355), (1480, 13778), (1660, 12284), (2960, 6889), (3071, 6640), (3320, 6142)]