19981710

素因数分解:

$2^1\times 3^2\times 5^1\times 7^2\times {\mathrm{23}}^1\times {\mathrm{197}}^1$

素因数の和:247

約数の個数: 144

約数和(自身を含む): 63382176

約数和(自身を除く): 43400466

約数列:

[1, 2, 3, 5, 6, 7, 9, 10, 14, 15, 18, 21, 23, 30, 35, 42, 45, 46, 49, 63, 69, 70, 90, 98, 105, 115, 126, 138, 147, 161, 197, 207, 210, 230, 245, 294, 315, 322, 345, 394, 414, 441, 483, 490, 591, 630, 690, 735, 805, 882, 966, 985, 1035, 1127, 1182, 1379, 1449, 1470, 1610, 1773, 1970, 2070, 2205, 2254, 2415, 2758, 2898, 2955, 3381, 3546, 4137, 4410, 4531, 4830, 5635, 5910, 6762, 6895, 7245, 8274, 8865, 9062, 9653, 10143, 11270, 12411, 13593, 13790, 14490, 16905, 17730, 19306, 20286, 20685, 22655, 24822, 27186, 28959, 31717, 33810, 40779, 41370, 45310, 48265, 50715, 57918, 62055, 63434, 67965, 81558, 86877, 95151, 96530, 101430, 124110, 135930, 144795, 158585, 173754, 190302, 203895, 222019, 285453, 289590, 317170, 407790, 434385, 444038, 475755, 570906, 666057, 868770, 951510, 1110095, 1332114, 1427265, 1998171, 2220190, 2854530, 3330285, 3996342, 6660570, 9990855, 19981710]

約数ペア:

[(1, 19981710), (2, 9990855), (3, 6660570), (5, 3996342), (6, 3330285), (7, 2854530), (9, 2220190), (10, 1998171), (14, 1427265), (15, 1332114), (18, 1110095), (21, 951510), (23, 868770), (30, 666057), (35, 570906), (42, 475755), (45, 444038), (46, 434385), (49, 407790), (63, 317170), (69, 289590), (70, 285453), (90, 222019), (98, 203895), (105, 190302), (115, 173754), (126, 158585), (138, 144795), (147, 135930), (161, 124110), (197, 101430), (207, 96530), (210, 95151), (230, 86877), (245, 81558), (294, 67965), (315, 63434), (322, 62055), (345, 57918), (394, 50715), (414, 48265), (441, 45310), (483, 41370), (490, 40779), (591, 33810), (630, 31717), (690, 28959), (735, 27186), (805, 24822), (882, 22655), (966, 20685), (985, 20286), (1035, 19306), (1127, 17730), (1182, 16905), (1379, 14490), (1449, 13790), (1470, 13593), (1610, 12411), (1773, 11270), (1970, 10143), (2070, 9653), (2205, 9062), (2254, 8865), (2415, 8274), (2758, 7245), (2898, 6895), (2955, 6762), (3381, 5910), (3546, 5635), (4137, 4830), (4410, 4531)]