21452340

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{3929}}^1$

素因数の和:3961

約数の個数: 96

約数和(自身を含む): 73946880

約数和(自身を除く): 52494540

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 13, 14, 15, 20, 21, 26, 28, 30, 35, 39, 42, 52, 60, 65, 70, 78, 84, 91, 105, 130, 140, 156, 182, 195, 210, 260, 273, 364, 390, 420, 455, 546, 780, 910, 1092, 1365, 1820, 2730, 3929, 5460, 7858, 11787, 15716, 19645, 23574, 27503, 39290, 47148, 51077, 55006, 58935, 78580, 82509, 102154, 110012, 117870, 137515, 153231, 165018, 204308, 235740, 255385, 275030, 306462, 330036, 357539, 412545, 510770, 550060, 612924, 715078, 766155, 825090, 1021540, 1072617, 1430156, 1532310, 1650180, 1787695, 2145234, 3064620, 3575390, 4290468, 5363085, 7150780, 10726170, 21452340]

約数ペア:

[(1, 21452340), (2, 10726170), (3, 7150780), (4, 5363085), (5, 4290468), (6, 3575390), (7, 3064620), (10, 2145234), (12, 1787695), (13, 1650180), (14, 1532310), (15, 1430156), (20, 1072617), (21, 1021540), (26, 825090), (28, 766155), (30, 715078), (35, 612924), (39, 550060), (42, 510770), (52, 412545), (60, 357539), (65, 330036), (70, 306462), (78, 275030), (84, 255385), (91, 235740), (105, 204308), (130, 165018), (140, 153231), (156, 137515), (182, 117870), (195, 110012), (210, 102154), (260, 82509), (273, 78580), (364, 58935), (390, 55006), (420, 51077), (455, 47148), (546, 39290), (780, 27503), (910, 23574), (1092, 19645), (1365, 15716), (1820, 11787), (2730, 7858), (3929, 5460)]