21871356

素因数分解:

$2^2\times 3^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{157}}^1$

素因数の和:243

約数の個数: 96

約数和(自身を含む): 59458560

約数和(自身を除く): 37587204

約数列:

[1, 2, 3, 4, 6, 12, 13, 19, 26, 38, 39, 47, 52, 57, 76, 78, 94, 114, 141, 156, 157, 188, 228, 247, 282, 314, 471, 494, 564, 611, 628, 741, 893, 942, 988, 1222, 1482, 1786, 1833, 1884, 2041, 2444, 2679, 2964, 2983, 3572, 3666, 4082, 5358, 5966, 6123, 7332, 7379, 8164, 8949, 10716, 11609, 11932, 12246, 14758, 17898, 22137, 23218, 24492, 29516, 34827, 35796, 38779, 44274, 46436, 69654, 77558, 88548, 95927, 116337, 139308, 140201, 155116, 191854, 232674, 280402, 287781, 383708, 420603, 465348, 560804, 575562, 841206, 1151124, 1682412, 1822613, 3645226, 5467839, 7290452, 10935678, 21871356]

約数ペア:

[(1, 21871356), (2, 10935678), (3, 7290452), (4, 5467839), (6, 3645226), (12, 1822613), (13, 1682412), (19, 1151124), (26, 841206), (38, 575562), (39, 560804), (47, 465348), (52, 420603), (57, 383708), (76, 287781), (78, 280402), (94, 232674), (114, 191854), (141, 155116), (156, 140201), (157, 139308), (188, 116337), (228, 95927), (247, 88548), (282, 77558), (314, 69654), (471, 46436), (494, 44274), (564, 38779), (611, 35796), (628, 34827), (741, 29516), (893, 24492), (942, 23218), (988, 22137), (1222, 17898), (1482, 14758), (1786, 12246), (1833, 11932), (1884, 11609), (2041, 10716), (2444, 8949), (2679, 8164), (2964, 7379), (2983, 7332), (3572, 6123), (3666, 5966), (4082, 5358)]