21357966

素因数分解:

$2^1\times 3^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{79}}^1\times {\mathrm{157}}^1$

素因数の和:289

約数の個数: 64

約数和(自身を含む): 50964480

約数和(自身を除く): 29606514

約数列:

[1, 2, 3, 6, 7, 14, 21, 41, 42, 79, 82, 123, 157, 158, 237, 246, 287, 314, 471, 474, 553, 574, 861, 942, 1099, 1106, 1659, 1722, 2198, 3239, 3297, 3318, 6437, 6478, 6594, 9717, 12403, 12874, 19311, 19434, 22673, 24806, 37209, 38622, 45059, 45346, 68019, 74418, 86821, 90118, 135177, 136038, 173642, 260463, 270354, 508523, 520926, 1017046, 1525569, 3051138, 3559661, 7119322, 10678983, 21357966]

約数ペア:

[(1, 21357966), (2, 10678983), (3, 7119322), (6, 3559661), (7, 3051138), (14, 1525569), (21, 1017046), (41, 520926), (42, 508523), (79, 270354), (82, 260463), (123, 173642), (157, 136038), (158, 135177), (237, 90118), (246, 86821), (287, 74418), (314, 68019), (471, 45346), (474, 45059), (553, 38622), (574, 37209), (861, 24806), (942, 22673), (1099, 19434), (1106, 19311), (1659, 12874), (1722, 12403), (2198, 9717), (3239, 6594), (3297, 6478), (3318, 6437)]