21000306645

素因数分解:

$3^7\times 5^1\times {\mathrm{29}}^1\times {\mathrm{47}}^1\times {\mathrm{1409}}^1$

素因数の和:1511

約数の個数: 128

約数和(自身を含む): 39958272000

約数和(自身を除く): 18957965355

約数列:

[1, 3, 5, 9, 15, 27, 29, 45, 47, 81, 87, 135, 141, 145, 235, 243, 261, 405, 423, 435, 705, 729, 783, 1215, 1269, 1305, 1363, 1409, 2115, 2187, 2349, 3645, 3807, 3915, 4089, 4227, 6345, 6815, 7045, 7047, 10935, 11421, 11745, 12267, 12681, 19035, 20445, 21135, 21141, 34263, 35235, 36801, 38043, 40861, 57105, 61335, 63405, 63423, 66223, 102789, 105705, 110403, 114129, 122583, 171315, 184005, 190215, 198669, 204305, 317115, 331115, 331209, 342387, 367749, 513945, 552015, 570645, 596007, 612915, 993345, 993627, 1027161, 1103247, 1656045, 1711935, 1788021, 1838745, 1920467, 2980035, 2980881, 3081483, 3309741, 4968135, 5135805, 5364063, 5516235, 5761401, 8940105, 9602335, 9929223, 14904405, 15407415, 16092189, 16548705, 17284203, 26820315, 28807005, 29787669, 48276567, 49646115, 51852609, 80460945, 86421015, 89363007, 144829701, 148938345, 155557827, 241382835, 259263045, 446815035, 466673481, 724148505, 777789135, 1400020443, 2333367405, 4200061329, 7000102215, 21000306645]

約数ペア:

[(1, 21000306645), (3, 7000102215), (5, 4200061329), (9, 2333367405), (15, 1400020443), (27, 777789135), (29, 724148505), (45, 466673481), (47, 446815035), (81, 259263045), (87, 241382835), (135, 155557827), (141, 148938345), (145, 144829701), (235, 89363007), (243, 86421015), (261, 80460945), (405, 51852609), (423, 49646115), (435, 48276567), (705, 29787669), (729, 28807005), (783, 26820315), (1215, 17284203), (1269, 16548705), (1305, 16092189), (1363, 15407415), (1409, 14904405), (2115, 9929223), (2187, 9602335), (2349, 8940105), (3645, 5761401), (3807, 5516235), (3915, 5364063), (4089, 5135805), (4227, 4968135), (6345, 3309741), (6815, 3081483), (7045, 2980881), (7047, 2980035), (10935, 1920467), (11421, 1838745), (11745, 1788021), (12267, 1711935), (12681, 1656045), (19035, 1103247), (20445, 1027161), (21135, 993627), (21141, 993345), (34263, 612915), (35235, 596007), (36801, 570645), (38043, 552015), (40861, 513945), (57105, 367749), (61335, 342387), (63405, 331209), (63423, 331115), (66223, 317115), (102789, 204305), (105705, 198669), (110403, 190215), (114129, 184005), (122583, 171315)]