20840000

素因数分解:

$2^6\times 5^4\times {\mathrm{521}}^1$

素因数の和:553

約数の個数: 70

約数和(自身を含む): 51775614

約数和(自身を除く): 30935614

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 125, 160, 200, 250, 320, 400, 500, 521, 625, 800, 1000, 1042, 1250, 1600, 2000, 2084, 2500, 2605, 4000, 4168, 5000, 5210, 8000, 8336, 10000, 10420, 13025, 16672, 20000, 20840, 26050, 33344, 40000, 41680, 52100, 65125, 83360, 104200, 130250, 166720, 208400, 260500, 325625, 416800, 521000, 651250, 833600, 1042000, 1302500, 2084000, 2605000, 4168000, 5210000, 10420000, 20840000]

約数ペア:

[(1, 20840000), (2, 10420000), (4, 5210000), (5, 4168000), (8, 2605000), (10, 2084000), (16, 1302500), (20, 1042000), (25, 833600), (32, 651250), (40, 521000), (50, 416800), (64, 325625), (80, 260500), (100, 208400), (125, 166720), (160, 130250), (200, 104200), (250, 83360), (320, 65125), (400, 52100), (500, 41680), (521, 40000), (625, 33344), (800, 26050), (1000, 20840), (1042, 20000), (1250, 16672), (1600, 13025), (2000, 10420), (2084, 10000), (2500, 8336), (2605, 8000), (4000, 5210), (4168, 5000)]