19660000

素因数分解:

$2^5\times 5^4\times {\mathrm{983}}^1$

素因数の和:1013

約数の個数: 60

約数和(自身を含む): 48415752

約数和(自身を除く): 28755752

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 125, 160, 200, 250, 400, 500, 625, 800, 983, 1000, 1250, 1966, 2000, 2500, 3932, 4000, 4915, 5000, 7864, 9830, 10000, 15728, 19660, 20000, 24575, 31456, 39320, 49150, 78640, 98300, 122875, 157280, 196600, 245750, 393200, 491500, 614375, 786400, 983000, 1228750, 1966000, 2457500, 3932000, 4915000, 9830000, 19660000]

約数ペア:

[(1, 19660000), (2, 9830000), (4, 4915000), (5, 3932000), (8, 2457500), (10, 1966000), (16, 1228750), (20, 983000), (25, 786400), (32, 614375), (40, 491500), (50, 393200), (80, 245750), (100, 196600), (125, 157280), (160, 122875), (200, 98300), (250, 78640), (400, 49150), (500, 39320), (625, 31456), (800, 24575), (983, 20000), (1000, 19660), (1250, 15728), (1966, 10000), (2000, 9830), (2500, 7864), (3932, 5000), (4000, 4915)]