28261480

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{139}}^1$

素因数の和:203

約数の個数: 128

約数和(自身を含む): 76204800

約数和(自身を除く): 47943320

約数列:

[1, 2, 4, 5, 8, 10, 13, 17, 20, 23, 26, 34, 40, 46, 52, 65, 68, 85, 92, 104, 115, 130, 136, 139, 170, 184, 221, 230, 260, 278, 299, 340, 391, 442, 460, 520, 556, 598, 680, 695, 782, 884, 920, 1105, 1112, 1196, 1390, 1495, 1564, 1768, 1807, 1955, 2210, 2363, 2392, 2780, 2990, 3128, 3197, 3614, 3910, 4420, 4726, 5083, 5560, 5980, 6394, 7228, 7820, 8840, 9035, 9452, 10166, 11815, 11960, 12788, 14456, 15640, 15985, 18070, 18904, 20332, 23630, 25415, 25576, 30719, 31970, 36140, 40664, 41561, 47260, 50830, 54349, 61438, 63940, 72280, 83122, 94520, 101660, 108698, 122876, 127880, 153595, 166244, 203320, 207805, 217396, 245752, 271745, 307190, 332488, 415610, 434792, 543490, 614380, 706537, 831220, 1086980, 1228760, 1413074, 1662440, 2173960, 2826148, 3532685, 5652296, 7065370, 14130740, 28261480]

約数ペア:

[(1, 28261480), (2, 14130740), (4, 7065370), (5, 5652296), (8, 3532685), (10, 2826148), (13, 2173960), (17, 1662440), (20, 1413074), (23, 1228760), (26, 1086980), (34, 831220), (40, 706537), (46, 614380), (52, 543490), (65, 434792), (68, 415610), (85, 332488), (92, 307190), (104, 271745), (115, 245752), (130, 217396), (136, 207805), (139, 203320), (170, 166244), (184, 153595), (221, 127880), (230, 122876), (260, 108698), (278, 101660), (299, 94520), (340, 83122), (391, 72280), (442, 63940), (460, 61438), (520, 54349), (556, 50830), (598, 47260), (680, 41561), (695, 40664), (782, 36140), (884, 31970), (920, 30719), (1105, 25576), (1112, 25415), (1196, 23630), (1390, 20332), (1495, 18904), (1564, 18070), (1768, 15985), (1807, 15640), (1955, 14456), (2210, 12788), (2363, 11960), (2392, 11815), (2780, 10166), (2990, 9452), (3128, 9035), (3197, 8840), (3614, 7820), (3910, 7228), (4420, 6394), (4726, 5980), (5083, 5560)]