21370725

素因数分解:

$3^2\times 5^2\times {\mathrm{19}}^1\times {\mathrm{4999}}^1$

素因数の和:5034

約数の個数: 36

約数和(自身を含む): 40300000

約数和(自身を除く): 18929275

約数列:

[1, 3, 5, 9, 15, 19, 25, 45, 57, 75, 95, 171, 225, 285, 475, 855, 1425, 4275, 4999, 14997, 24995, 44991, 74985, 94981, 124975, 224955, 284943, 374925, 474905, 854829, 1124775, 1424715, 2374525, 4274145, 7123575, 21370725]

約数ペア:

[(1, 21370725), (3, 7123575), (5, 4274145), (9, 2374525), (15, 1424715), (19, 1124775), (25, 854829), (45, 474905), (57, 374925), (75, 284943), (95, 224955), (171, 124975), (225, 94981), (285, 74985), (475, 44991), (855, 24995), (1425, 14997), (4275, 4999)]