15987780

素因数分解:

$2^2\times 3^4\times 5^1\times {\mathrm{71}}^1\times {\mathrm{139}}^1$

素因数の和:231

約数の個数: 120

約数和(自身を含む): 51226560

約数和(自身を除く): 35238780

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 27, 30, 36, 45, 54, 60, 71, 81, 90, 108, 135, 139, 142, 162, 180, 213, 270, 278, 284, 324, 355, 405, 417, 426, 540, 556, 639, 695, 710, 810, 834, 852, 1065, 1251, 1278, 1390, 1420, 1620, 1668, 1917, 2085, 2130, 2502, 2556, 2780, 3195, 3753, 3834, 4170, 4260, 5004, 5751, 6255, 6390, 7506, 7668, 8340, 9585, 9869, 11259, 11502, 12510, 12780, 15012, 18765, 19170, 19738, 22518, 23004, 25020, 28755, 29607, 37530, 38340, 39476, 45036, 49345, 56295, 57510, 59214, 75060, 88821, 98690, 112590, 115020, 118428, 148035, 177642, 197380, 225180, 266463, 296070, 355284, 444105, 532926, 592140, 799389, 888210, 1065852, 1332315, 1598778, 1776420, 2664630, 3197556, 3996945, 5329260, 7993890, 15987780]

約数ペア:

[(1, 15987780), (2, 7993890), (3, 5329260), (4, 3996945), (5, 3197556), (6, 2664630), (9, 1776420), (10, 1598778), (12, 1332315), (15, 1065852), (18, 888210), (20, 799389), (27, 592140), (30, 532926), (36, 444105), (45, 355284), (54, 296070), (60, 266463), (71, 225180), (81, 197380), (90, 177642), (108, 148035), (135, 118428), (139, 115020), (142, 112590), (162, 98690), (180, 88821), (213, 75060), (270, 59214), (278, 57510), (284, 56295), (324, 49345), (355, 45036), (405, 39476), (417, 38340), (426, 37530), (540, 29607), (556, 28755), (639, 25020), (695, 23004), (710, 22518), (810, 19738), (834, 19170), (852, 18765), (1065, 15012), (1251, 12780), (1278, 12510), (1390, 11502), (1420, 11259), (1620, 9869), (1668, 9585), (1917, 8340), (2085, 7668), (2130, 7506), (2502, 6390), (2556, 6255), (2780, 5751), (3195, 5004), (3753, 4260), (3834, 4170)]