19540000

素因数分解:

$2^5\times 5^4\times {\mathrm{977}}^1$

素因数の和:1007

約数の個数: 60

約数和(自身を含む): 48120534

約数和(自身を除く): 28580534

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, 977, 1000, 1250, 1954, 2000, 2500, 3908, 4000, 4885, 5000, 7816, 9770, 10000, 15632, 19540, 20000, 24425, 31264, 39080, 48850, 78160, 97700, 122125, 156320, 195400, 244250, 390800, 488500, 610625, 781600, 977000, 1221250, 1954000, 2442500, 3908000, 4885000, 9770000, 19540000]

約数ペア:

[(1, 19540000), (2, 9770000), (4, 4885000), (5, 3908000), (8, 2442500), (10, 1954000), (16, 1221250), (20, 977000), (25, 781600), (32, 610625), (40, 488500), (50, 390800), (80, 244250), (100, 195400), (125, 156320), (160, 122125), (200, 97700), (250, 78160), (400, 48850), (500, 39080), (625, 31264), (800, 24425), (977, 20000), (1000, 19540), (1250, 15632), (1954, 10000), (2000, 9770), (2500, 7816), (3908, 5000), (4000, 4885)]