21509628

素因数分解:

$2^2\times 3^1\times 7^2\times {\mathrm{157}}^1\times {\mathrm{233}}^1$

素因数の和:411

約数の個数: 72

約数和(自身を含む): 59007312

約数和(自身を除く): 37497684

約数列:

[1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 49, 84, 98, 147, 157, 196, 233, 294, 314, 466, 471, 588, 628, 699, 932, 942, 1099, 1398, 1631, 1884, 2198, 2796, 3262, 3297, 4396, 4893, 6524, 6594, 7693, 9786, 11417, 13188, 15386, 19572, 22834, 23079, 30772, 34251, 36581, 45668, 46158, 68502, 73162, 92316, 109743, 137004, 146324, 219486, 256067, 438972, 512134, 768201, 1024268, 1536402, 1792469, 3072804, 3584938, 5377407, 7169876, 10754814, 21509628]

約数ペア:

[(1, 21509628), (2, 10754814), (3, 7169876), (4, 5377407), (6, 3584938), (7, 3072804), (12, 1792469), (14, 1536402), (21, 1024268), (28, 768201), (42, 512134), (49, 438972), (84, 256067), (98, 219486), (147, 146324), (157, 137004), (196, 109743), (233, 92316), (294, 73162), (314, 68502), (466, 46158), (471, 45668), (588, 36581), (628, 34251), (699, 30772), (932, 23079), (942, 22834), (1099, 19572), (1398, 15386), (1631, 13188), (1884, 11417), (2198, 9786), (2796, 7693), (3262, 6594), (3297, 6524), (4396, 4893)]