20797140

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{13}}^2\times {\mathrm{293}}^1$

素因数の和:338

約数の個数: 144

約数和(自身を含む): 72309888

約数和(自身を除く): 51512748

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, 169, 182, 195, 210, 260, 273, 293, 338, 364, 390, 420, 455, 507, 546, 586, 676, 780, 845, 879, 910, 1014, 1092, 1172, 1183, 1365, 1465, 1690, 1758, 1820, 2028, 2051, 2366, 2535, 2730, 2930, 3380, 3516, 3549, 3809, 4102, 4395, 4732, 5070, 5460, 5860, 5915, 6153, 7098, 7618, 8204, 8790, 10140, 10255, 11427, 11830, 12306, 14196, 15236, 17580, 17745, 19045, 20510, 22854, 23660, 24612, 26663, 30765, 35490, 38090, 41020, 45708, 49517, 53326, 57135, 61530, 70980, 76180, 79989, 99034, 106652, 114270, 123060, 133315, 148551, 159978, 198068, 228540, 247585, 266630, 297102, 319956, 346619, 399945, 495170, 533260, 594204, 693238, 742755, 799890, 990340, 1039857, 1386476, 1485510, 1599780, 1733095, 2079714, 2971020, 3466190, 4159428, 5199285, 6932380, 10398570, 20797140]

約数ペア:

[(1, 20797140), (2, 10398570), (3, 6932380), (4, 5199285), (5, 4159428), (6, 3466190), (7, 2971020), (10, 2079714), (12, 1733095), (13, 1599780), (14, 1485510), (15, 1386476), (20, 1039857), (21, 990340), (26, 799890), (28, 742755), (30, 693238), (35, 594204), (39, 533260), (42, 495170), (52, 399945), (60, 346619), (65, 319956), (70, 297102), (78, 266630), (84, 247585), (91, 228540), (105, 198068), (130, 159978), (140, 148551), (156, 133315), (169, 123060), (182, 114270), (195, 106652), (210, 99034), (260, 79989), (273, 76180), (293, 70980), (338, 61530), (364, 57135), (390, 53326), (420, 49517), (455, 45708), (507, 41020), (546, 38090), (586, 35490), (676, 30765), (780, 26663), (845, 24612), (879, 23660), (910, 22854), (1014, 20510), (1092, 19045), (1172, 17745), (1183, 17580), (1365, 15236), (1465, 14196), (1690, 12306), (1758, 11830), (1820, 11427), (2028, 10255), (2051, 10140), (2366, 8790), (2535, 8204), (2730, 7618), (2930, 7098), (3380, 6153), (3516, 5915), (3549, 5860), (3809, 5460), (4102, 5070), (4395, 4732)]