21145291288

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{157}}^1\times {\mathrm{197}}^1\times {\mathrm{457}}^1$

素因数の和:845

約数の個数: 128

約数和(自身を含む): 46422953280

約数和(自身を除く): 25277661992

約数列:

[1, 2, 4, 8, 11, 17, 22, 34, 44, 68, 88, 136, 157, 187, 197, 314, 374, 394, 457, 628, 748, 788, 914, 1256, 1496, 1576, 1727, 1828, 2167, 2669, 3349, 3454, 3656, 4334, 5027, 5338, 6698, 6908, 7769, 8668, 10054, 10676, 13396, 13816, 15538, 17336, 20108, 21352, 26792, 29359, 30929, 31076, 36839, 40216, 58718, 61858, 62152, 71749, 73678, 85459, 90029, 117436, 123716, 143498, 147356, 170918, 180058, 234872, 247432, 286996, 294712, 340219, 341836, 360116, 525793, 573992, 680438, 683672, 720232, 789239, 990319, 1051586, 1219733, 1360876, 1530493, 1578478, 1980638, 2103172, 2439466, 2721752, 3060986, 3156956, 3961276, 4206344, 4878932, 5783723, 6121972, 6313912, 7922552, 9757864, 11567446, 12243944, 13417063, 14134553, 16835423, 23134892, 26834126, 28269106, 33670846, 46269784, 53668252, 56538212, 67341692, 107336504, 113076424, 134683384, 155480083, 240287401, 310960166, 480574802, 621920332, 961149604, 1243840664, 1922299208, 2643161411, 5286322822, 10572645644, 21145291288]

約数ペア:

[(1, 21145291288), (2, 10572645644), (4, 5286322822), (8, 2643161411), (11, 1922299208), (17, 1243840664), (22, 961149604), (34, 621920332), (44, 480574802), (68, 310960166), (88, 240287401), (136, 155480083), (157, 134683384), (187, 113076424), (197, 107336504), (314, 67341692), (374, 56538212), (394, 53668252), (457, 46269784), (628, 33670846), (748, 28269106), (788, 26834126), (914, 23134892), (1256, 16835423), (1496, 14134553), (1576, 13417063), (1727, 12243944), (1828, 11567446), (2167, 9757864), (2669, 7922552), (3349, 6313912), (3454, 6121972), (3656, 5783723), (4334, 4878932), (5027, 4206344), (5338, 3961276), (6698, 3156956), (6908, 3060986), (7769, 2721752), (8668, 2439466), (10054, 2103172), (10676, 1980638), (13396, 1578478), (13816, 1530493), (15538, 1360876), (17336, 1219733), (20108, 1051586), (21352, 990319), (26792, 789239), (29359, 720232), (30929, 683672), (31076, 680438), (36839, 573992), (40216, 525793), (58718, 360116), (61858, 341836), (62152, 340219), (71749, 294712), (73678, 286996), (85459, 247432), (90029, 234872), (117436, 180058), (123716, 170918), (143498, 147356)]