19728400

素因数分解:

$2^4\times 5^2\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{43}}^1$

素因数の和:129

約数の個数: 120

約数和(自身を含む): 51417344

約数和(自身を除く): 31688944

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 31, 37, 40, 43, 50, 62, 74, 80, 86, 100, 124, 148, 155, 172, 185, 200, 215, 248, 296, 310, 344, 370, 400, 430, 496, 592, 620, 688, 740, 775, 860, 925, 1075, 1147, 1240, 1333, 1480, 1550, 1591, 1720, 1850, 2150, 2294, 2480, 2666, 2960, 3100, 3182, 3440, 3700, 4300, 4588, 5332, 5735, 6200, 6364, 6665, 7400, 7955, 8600, 9176, 10664, 11470, 12400, 12728, 13330, 14800, 15910, 17200, 18352, 21328, 22940, 25456, 26660, 28675, 31820, 33325, 39775, 45880, 49321, 53320, 57350, 63640, 66650, 79550, 91760, 98642, 106640, 114700, 127280, 133300, 159100, 197284, 229400, 246605, 266600, 318200, 394568, 458800, 493210, 533200, 636400, 789136, 986420, 1233025, 1972840, 2466050, 3945680, 4932100, 9864200, 19728400]

約数ペア:

[(1, 19728400), (2, 9864200), (4, 4932100), (5, 3945680), (8, 2466050), (10, 1972840), (16, 1233025), (20, 986420), (25, 789136), (31, 636400), (37, 533200), (40, 493210), (43, 458800), (50, 394568), (62, 318200), (74, 266600), (80, 246605), (86, 229400), (100, 197284), (124, 159100), (148, 133300), (155, 127280), (172, 114700), (185, 106640), (200, 98642), (215, 91760), (248, 79550), (296, 66650), (310, 63640), (344, 57350), (370, 53320), (400, 49321), (430, 45880), (496, 39775), (592, 33325), (620, 31820), (688, 28675), (740, 26660), (775, 25456), (860, 22940), (925, 21328), (1075, 18352), (1147, 17200), (1240, 15910), (1333, 14800), (1480, 13330), (1550, 12728), (1591, 12400), (1720, 11470), (1850, 10664), (2150, 9176), (2294, 8600), (2480, 7955), (2666, 7400), (2960, 6665), (3100, 6364), (3182, 6200), (3440, 5735), (3700, 5332), (4300, 4588)]