19664000

素因数分解:

$2^7\times 5^3\times {\mathrm{1229}}^1$

素因数の和:1258

約数の個数: 64

約数和(自身を含む): 48929400

約数和(自身を除く): 29265400

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 125, 128, 160, 200, 250, 320, 400, 500, 640, 800, 1000, 1229, 1600, 2000, 2458, 3200, 4000, 4916, 6145, 8000, 9832, 12290, 16000, 19664, 24580, 30725, 39328, 49160, 61450, 78656, 98320, 122900, 153625, 157312, 196640, 245800, 307250, 393280, 491600, 614500, 786560, 983200, 1229000, 1966400, 2458000, 3932800, 4916000, 9832000, 19664000]

約数ペア:

[(1, 19664000), (2, 9832000), (4, 4916000), (5, 3932800), (8, 2458000), (10, 1966400), (16, 1229000), (20, 983200), (25, 786560), (32, 614500), (40, 491600), (50, 393280), (64, 307250), (80, 245800), (100, 196640), (125, 157312), (128, 153625), (160, 122900), (200, 98320), (250, 78656), (320, 61450), (400, 49160), (500, 39328), (640, 30725), (800, 24580), (1000, 19664), (1229, 16000), (1600, 12290), (2000, 9832), (2458, 8000), (3200, 6145), (4000, 4916)]