646387980

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{81001}}^1$

素因数の和:81039

約数の個数: 96

約数和(自身を含む): 2177333760

約数和(自身を除く): 1530945780

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 19, 20, 21, 28, 30, 35, 38, 42, 57, 60, 70, 76, 84, 95, 105, 114, 133, 140, 190, 210, 228, 266, 285, 380, 399, 420, 532, 570, 665, 798, 1140, 1330, 1596, 1995, 2660, 3990, 7980, 81001, 162002, 243003, 324004, 405005, 486006, 567007, 810010, 972012, 1134014, 1215015, 1539019, 1620020, 1701021, 2268028, 2430030, 2835035, 3078038, 3402042, 4617057, 4860060, 5670070, 6156076, 6804084, 7695095, 8505105, 9234114, 10773133, 11340140, 15390190, 17010210, 18468228, 21546266, 23085285, 30780380, 32319399, 34020420, 43092532, 46170570, 53865665, 64638798, 92341140, 107731330, 129277596, 161596995, 215462660, 323193990, 646387980]

約数ペア:

[(1, 646387980), (2, 323193990), (3, 215462660), (4, 161596995), (5, 129277596), (6, 107731330), (7, 92341140), (10, 64638798), (12, 53865665), (14, 46170570), (15, 43092532), (19, 34020420), (20, 32319399), (21, 30780380), (28, 23085285), (30, 21546266), (35, 18468228), (38, 17010210), (42, 15390190), (57, 11340140), (60, 10773133), (70, 9234114), (76, 8505105), (84, 7695095), (95, 6804084), (105, 6156076), (114, 5670070), (133, 4860060), (140, 4617057), (190, 3402042), (210, 3078038), (228, 2835035), (266, 2430030), (285, 2268028), (380, 1701021), (399, 1620020), (420, 1539019), (532, 1215015), (570, 1134014), (665, 972012), (798, 810010), (1140, 567007), (1330, 486006), (1596, 405005), (1995, 324004), (2660, 243003), (3990, 162002), (7980, 81001)]