81048400

素因数分解:

$2^4\times 5^2\times {\mathrm{202621}}^1$

素因数の和:202639

約数の個数: 30

約数和(自身を含む): 194719742

約数和(自身を除く): 113671342

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 202621, 405242, 810484, 1013105, 1620968, 2026210, 3241936, 4052420, 5065525, 8104840, 10131050, 16209680, 20262100, 40524200, 81048400]

約数ペア:

[(1, 81048400), (2, 40524200), (4, 20262100), (5, 16209680), (8, 10131050), (10, 8104840), (16, 5065525), (20, 4052420), (25, 3241936), (40, 2026210), (50, 1620968), (80, 1013105), (100, 810484), (200, 405242), (400, 202621)]