21910140

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{17389}}^1$

素因数の和:17411

約数の個数: 72

約数和(自身を含む): 75959520

約数和(自身を除く): 54049380

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 60, 63, 70, 84, 90, 105, 126, 140, 180, 210, 252, 315, 420, 630, 1260, 17389, 34778, 52167, 69556, 86945, 104334, 121723, 156501, 173890, 208668, 243446, 260835, 313002, 347780, 365169, 486892, 521670, 608615, 626004, 730338, 782505, 1043340, 1095507, 1217230, 1460676, 1565010, 1825845, 2191014, 2434460, 3130020, 3651690, 4382028, 5477535, 7303380, 10955070, 21910140]

約数ペア:

[(1, 21910140), (2, 10955070), (3, 7303380), (4, 5477535), (5, 4382028), (6, 3651690), (7, 3130020), (9, 2434460), (10, 2191014), (12, 1825845), (14, 1565010), (15, 1460676), (18, 1217230), (20, 1095507), (21, 1043340), (28, 782505), (30, 730338), (35, 626004), (36, 608615), (42, 521670), (45, 486892), (60, 365169), (63, 347780), (70, 313002), (84, 260835), (90, 243446), (105, 208668), (126, 173890), (140, 156501), (180, 121723), (210, 104334), (252, 86945), (315, 69556), (420, 52167), (630, 34778), (1260, 17389)]