21356456

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{241}}^1$

素因数の和:330

約数の個数: 64

約数和(自身を含む): 47044800

約数和(自身を除く): 25688344

約数列:

[1, 2, 4, 8, 11, 19, 22, 38, 44, 53, 76, 88, 106, 152, 209, 212, 241, 418, 424, 482, 583, 836, 964, 1007, 1166, 1672, 1928, 2014, 2332, 2651, 4028, 4579, 4664, 5302, 8056, 9158, 10604, 11077, 12773, 18316, 21208, 22154, 25546, 36632, 44308, 50369, 51092, 88616, 100738, 102184, 140503, 201476, 242687, 281006, 402952, 485374, 562012, 970748, 1124024, 1941496, 2669557, 5339114, 10678228, 21356456]

約数ペア:

[(1, 21356456), (2, 10678228), (4, 5339114), (8, 2669557), (11, 1941496), (19, 1124024), (22, 970748), (38, 562012), (44, 485374), (53, 402952), (76, 281006), (88, 242687), (106, 201476), (152, 140503), (209, 102184), (212, 100738), (241, 88616), (418, 51092), (424, 50369), (482, 44308), (583, 36632), (836, 25546), (964, 22154), (1007, 21208), (1166, 18316), (1672, 12773), (1928, 11077), (2014, 10604), (2332, 9158), (2651, 8056), (4028, 5302), (4579, 4664)]