21380458928

素因数分解:

$2^4\times {\mathrm{19}}^2\times {\mathrm{41}}^1\times {\mathrm{137}}^1\times {\mathrm{659}}^1$

素因数の和:883

約数の個数: 120

約数和(自身を含む): 45181326960

約数和(自身を除く): 23800868032

約数列:

[1, 2, 4, 8, 16, 19, 38, 41, 76, 82, 137, 152, 164, 274, 304, 328, 361, 548, 656, 659, 722, 779, 1096, 1318, 1444, 1558, 2192, 2603, 2636, 2888, 3116, 5206, 5272, 5617, 5776, 6232, 10412, 10544, 11234, 12464, 12521, 14801, 20824, 22468, 25042, 27019, 29602, 41648, 44936, 49457, 50084, 54038, 59204, 89872, 90283, 98914, 100168, 106723, 108076, 118408, 180566, 197828, 200336, 213446, 216152, 236816, 237899, 361132, 395656, 426892, 432304, 475798, 513361, 722264, 791312, 853784, 951596, 1026722, 1444528, 1707568, 1715377, 1903192, 2027737, 2053444, 3430754, 3701603, 3806384, 4055474, 4106888, 6861508, 7403206, 8110948, 8213776, 9753859, 13723016, 14806412, 16221896, 19507718, 27446032, 29612824, 32443792, 32592163, 39015436, 59225648, 65184326, 70330457, 78030872, 130368652, 140660914, 156061744, 260737304, 281321828, 521474608, 562643656, 1125287312, 1336278683, 2672557366, 5345114732, 10690229464, 21380458928]

約数ペア:

[(1, 21380458928), (2, 10690229464), (4, 5345114732), (8, 2672557366), (16, 1336278683), (19, 1125287312), (38, 562643656), (41, 521474608), (76, 281321828), (82, 260737304), (137, 156061744), (152, 140660914), (164, 130368652), (274, 78030872), (304, 70330457), (328, 65184326), (361, 59225648), (548, 39015436), (656, 32592163), (659, 32443792), (722, 29612824), (779, 27446032), (1096, 19507718), (1318, 16221896), (1444, 14806412), (1558, 13723016), (2192, 9753859), (2603, 8213776), (2636, 8110948), (2888, 7403206), (3116, 6861508), (5206, 4106888), (5272, 4055474), (5617, 3806384), (5776, 3701603), (6232, 3430754), (10412, 2053444), (10544, 2027737), (11234, 1903192), (12464, 1715377), (12521, 1707568), (14801, 1444528), (20824, 1026722), (22468, 951596), (25042, 853784), (27019, 791312), (29602, 722264), (41648, 513361), (44936, 475798), (49457, 432304), (50084, 426892), (54038, 395656), (59204, 361132), (89872, 237899), (90283, 236816), (98914, 216152), (100168, 213446), (106723, 200336), (108076, 197828), (118408, 180566)]