20163460720

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{245417}}^1$

素因数の和:245522

約数の個数: 80

約数和(自身を含む): 51125477760

約数和(自身を除く): 30962017040

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 79, 80, 104, 130, 158, 208, 260, 316, 395, 520, 632, 790, 1027, 1040, 1264, 1580, 2054, 3160, 4108, 5135, 6320, 8216, 10270, 16432, 20540, 41080, 82160, 245417, 490834, 981668, 1227085, 1963336, 2454170, 3190421, 3926672, 4908340, 6380842, 9816680, 12761684, 15952105, 19387943, 19633360, 25523368, 31904210, 38775886, 51046736, 63808420, 77551772, 96939715, 127616840, 155103544, 193879430, 252043259, 255233680, 310207088, 387758860, 504086518, 775517720, 1008173036, 1260216295, 1551035440, 2016346072, 2520432590, 4032692144, 5040865180, 10081730360, 20163460720]

約数ペア:

[(1, 20163460720), (2, 10081730360), (4, 5040865180), (5, 4032692144), (8, 2520432590), (10, 2016346072), (13, 1551035440), (16, 1260216295), (20, 1008173036), (26, 775517720), (40, 504086518), (52, 387758860), (65, 310207088), (79, 255233680), (80, 252043259), (104, 193879430), (130, 155103544), (158, 127616840), (208, 96939715), (260, 77551772), (316, 63808420), (395, 51046736), (520, 38775886), (632, 31904210), (790, 25523368), (1027, 19633360), (1040, 19387943), (1264, 15952105), (1580, 12761684), (2054, 9816680), (3160, 6380842), (4108, 4908340), (5135, 3926672), (6320, 3190421), (8216, 2454170), (10270, 1963336), (16432, 1227085), (20540, 981668), (41080, 490834), (82160, 245417)]