20178200

素因数分解:

$2^3\times 5^2\times 7^2\times {\mathrm{29}}^1\times {\mathrm{71}}^1$

素因数の和:130

約数の個数: 144

約数和(自身を含む): 57250800

約数和(自身を除く): 37072600

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 25, 28, 29, 35, 40, 49, 50, 56, 58, 70, 71, 98, 100, 116, 140, 142, 145, 175, 196, 200, 203, 232, 245, 280, 284, 290, 350, 355, 392, 406, 490, 497, 568, 580, 700, 710, 725, 812, 980, 994, 1015, 1160, 1225, 1400, 1420, 1421, 1450, 1624, 1775, 1960, 1988, 2030, 2059, 2450, 2485, 2840, 2842, 2900, 3479, 3550, 3976, 4060, 4118, 4900, 4970, 5075, 5684, 5800, 6958, 7100, 7105, 8120, 8236, 9800, 9940, 10150, 10295, 11368, 12425, 13916, 14200, 14210, 14413, 16472, 17395, 19880, 20300, 20590, 24850, 27832, 28420, 28826, 34790, 35525, 40600, 41180, 49700, 51475, 56840, 57652, 69580, 71050, 72065, 82360, 86975, 99400, 100891, 102950, 115304, 139160, 142100, 144130, 173950, 201782, 205900, 284200, 288260, 347900, 360325, 403564, 411800, 504455, 576520, 695800, 720650, 807128, 1008910, 1441300, 2017820, 2522275, 2882600, 4035640, 5044550, 10089100, 20178200]

約数ペア:

[(1, 20178200), (2, 10089100), (4, 5044550), (5, 4035640), (7, 2882600), (8, 2522275), (10, 2017820), (14, 1441300), (20, 1008910), (25, 807128), (28, 720650), (29, 695800), (35, 576520), (40, 504455), (49, 411800), (50, 403564), (56, 360325), (58, 347900), (70, 288260), (71, 284200), (98, 205900), (100, 201782), (116, 173950), (140, 144130), (142, 142100), (145, 139160), (175, 115304), (196, 102950), (200, 100891), (203, 99400), (232, 86975), (245, 82360), (280, 72065), (284, 71050), (290, 69580), (350, 57652), (355, 56840), (392, 51475), (406, 49700), (490, 41180), (497, 40600), (568, 35525), (580, 34790), (700, 28826), (710, 28420), (725, 27832), (812, 24850), (980, 20590), (994, 20300), (1015, 19880), (1160, 17395), (1225, 16472), (1400, 14413), (1420, 14210), (1421, 14200), (1450, 13916), (1624, 12425), (1775, 11368), (1960, 10295), (1988, 10150), (2030, 9940), (2059, 9800), (2450, 8236), (2485, 8120), (2840, 7105), (2842, 7100), (2900, 6958), (3479, 5800), (3550, 5684), (3976, 5075), (4060, 4970), (4118, 4900)]