21261288

素因数分解:

$2^3\times 3^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{41}}^2$

素因数の和:139

約数の個数: 96

約数和(自身を含む): 59546880

約数和(自身を除く): 38285592

約数列:

[1, 2, 3, 4, 6, 8, 12, 17, 24, 31, 34, 41, 51, 62, 68, 82, 93, 102, 123, 124, 136, 164, 186, 204, 246, 248, 328, 372, 408, 492, 527, 697, 744, 984, 1054, 1271, 1394, 1581, 1681, 2091, 2108, 2542, 2788, 3162, 3362, 3813, 4182, 4216, 5043, 5084, 5576, 6324, 6724, 7626, 8364, 10086, 10168, 12648, 13448, 15252, 16728, 20172, 21607, 28577, 30504, 40344, 43214, 52111, 57154, 64821, 85731, 86428, 104222, 114308, 129642, 156333, 171462, 172856, 208444, 228616, 259284, 312666, 342924, 416888, 518568, 625332, 685848, 885887, 1250664, 1771774, 2657661, 3543548, 5315322, 7087096, 10630644, 21261288]

約数ペア:

[(1, 21261288), (2, 10630644), (3, 7087096), (4, 5315322), (6, 3543548), (8, 2657661), (12, 1771774), (17, 1250664), (24, 885887), (31, 685848), (34, 625332), (41, 518568), (51, 416888), (62, 342924), (68, 312666), (82, 259284), (93, 228616), (102, 208444), (123, 172856), (124, 171462), (136, 156333), (164, 129642), (186, 114308), (204, 104222), (246, 86428), (248, 85731), (328, 64821), (372, 57154), (408, 52111), (492, 43214), (527, 40344), (697, 30504), (744, 28577), (984, 21607), (1054, 20172), (1271, 16728), (1394, 15252), (1581, 13448), (1681, 12648), (2091, 10168), (2108, 10086), (2542, 8364), (2788, 7626), (3162, 6724), (3362, 6324), (3813, 5576), (4182, 5084), (4216, 5043)]