18320000

素因数分解:

$2^7\times 5^4\times {\mathrm{229}}^1$

素因数の和:263

約数の個数: 80

約数和(自身を含む): 45805650

約数和(自身を除く): 27485650

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 125, 128, 160, 200, 229, 250, 320, 400, 458, 500, 625, 640, 800, 916, 1000, 1145, 1250, 1600, 1832, 2000, 2290, 2500, 3200, 3664, 4000, 4580, 5000, 5725, 7328, 8000, 9160, 10000, 11450, 14656, 16000, 18320, 20000, 22900, 28625, 29312, 36640, 40000, 45800, 57250, 73280, 80000, 91600, 114500, 143125, 146560, 183200, 229000, 286250, 366400, 458000, 572500, 732800, 916000, 1145000, 1832000, 2290000, 3664000, 4580000, 9160000, 18320000]

約数ペア:

[(1, 18320000), (2, 9160000), (4, 4580000), (5, 3664000), (8, 2290000), (10, 1832000), (16, 1145000), (20, 916000), (25, 732800), (32, 572500), (40, 458000), (50, 366400), (64, 286250), (80, 229000), (100, 183200), (125, 146560), (128, 143125), (160, 114500), (200, 91600), (229, 80000), (250, 73280), (320, 57250), (400, 45800), (458, 40000), (500, 36640), (625, 29312), (640, 28625), (800, 22900), (916, 20000), (1000, 18320), (1145, 16000), (1250, 14656), (1600, 11450), (1832, 10000), (2000, 9160), (2290, 8000), (2500, 7328), (3200, 5725), (3664, 5000), (4000, 4580)]