20447800

素因数分解:

$2^3\times 5^2\times {\mathrm{19}}^1\times {\mathrm{5381}}^1$

素因数の和:5416

約数の個数: 48

約数和(自身を含む): 50052600

約数和(自身を除く): 29604800

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 25, 38, 40, 50, 76, 95, 100, 152, 190, 200, 380, 475, 760, 950, 1900, 3800, 5381, 10762, 21524, 26905, 43048, 53810, 102239, 107620, 134525, 204478, 215240, 269050, 408956, 511195, 538100, 817912, 1022390, 1076200, 2044780, 2555975, 4089560, 5111950, 10223900, 20447800]

約数ペア:

[(1, 20447800), (2, 10223900), (4, 5111950), (5, 4089560), (8, 2555975), (10, 2044780), (19, 1076200), (20, 1022390), (25, 817912), (38, 538100), (40, 511195), (50, 408956), (76, 269050), (95, 215240), (100, 204478), (152, 134525), (190, 107620), (200, 102239), (380, 53810), (475, 43048), (760, 26905), (950, 21524), (1900, 10762), (3800, 5381)]