2005512800

素因数分解:

$2^5\times 5^2\times {\mathrm{109}}^2\times {\mathrm{211}}^1$

素因数の和:449

約数の個数: 108

約数和(自身を含む): 4964705676

約数和(自身を除く): 2959192876

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 109, 160, 200, 211, 218, 400, 422, 436, 545, 800, 844, 872, 1055, 1090, 1688, 1744, 2110, 2180, 2725, 3376, 3488, 4220, 4360, 5275, 5450, 6752, 8440, 8720, 10550, 10900, 11881, 16880, 17440, 21100, 21800, 22999, 23762, 33760, 42200, 43600, 45998, 47524, 59405, 84400, 87200, 91996, 95048, 114995, 118810, 168800, 183992, 190096, 229990, 237620, 297025, 367984, 380192, 459980, 475240, 574975, 594050, 735968, 919960, 950480, 1149950, 1188100, 1839920, 1900960, 2299900, 2376200, 2506891, 3679840, 4599800, 4752400, 5013782, 9199600, 9504800, 10027564, 12534455, 18399200, 20055128, 25068910, 40110256, 50137820, 62672275, 80220512, 100275640, 125344550, 200551280, 250689100, 401102560, 501378200, 1002756400, 2005512800]

約数ペア:

[(1, 2005512800), (2, 1002756400), (4, 501378200), (5, 401102560), (8, 250689100), (10, 200551280), (16, 125344550), (20, 100275640), (25, 80220512), (32, 62672275), (40, 50137820), (50, 40110256), (80, 25068910), (100, 20055128), (109, 18399200), (160, 12534455), (200, 10027564), (211, 9504800), (218, 9199600), (400, 5013782), (422, 4752400), (436, 4599800), (545, 3679840), (800, 2506891), (844, 2376200), (872, 2299900), (1055, 1900960), (1090, 1839920), (1688, 1188100), (1744, 1149950), (2110, 950480), (2180, 919960), (2725, 735968), (3376, 594050), (3488, 574975), (4220, 475240), (4360, 459980), (5275, 380192), (5450, 367984), (6752, 297025), (8440, 237620), (8720, 229990), (10550, 190096), (10900, 183992), (11881, 168800), (16880, 118810), (17440, 114995), (21100, 95048), (21800, 91996), (22999, 87200), (23762, 84400), (33760, 59405), (42200, 47524), (43600, 45998)]