81697980

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{13}}^2\times {\mathrm{1151}}^1$

素因数の和:1196

約数の個数: 144

約数和(自身を含む): 283336704

約数和(自身を除く): 201638724

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, 338, 364, 390, 420, 455, 507, 546, 676, 780, 845, 910, 1014, 1092, 1151, 1183, 1365, 1690, 1820, 2028, 2302, 2366, 2535, 2730, 3380, 3453, 3549, 4604, 4732, 5070, 5460, 5755, 5915, 6906, 7098, 8057, 10140, 11510, 11830, 13812, 14196, 14963, 16114, 17265, 17745, 23020, 23660, 24171, 29926, 32228, 34530, 35490, 40285, 44889, 48342, 59852, 69060, 70980, 74815, 80570, 89778, 96684, 104741, 120855, 149630, 161140, 179556, 194519, 209482, 224445, 241710, 299260, 314223, 389038, 418964, 448890, 483420, 523705, 583557, 628446, 778076, 897780, 972595, 1047410, 1167114, 1256892, 1361633, 1571115, 1945190, 2094820, 2334228, 2723266, 2917785, 3142230, 3890380, 4084899, 5446532, 5835570, 6284460, 6808165, 8169798, 11671140, 13616330, 16339596, 20424495, 27232660, 40848990, 81697980]

約数ペア:

[(1, 81697980), (2, 40848990), (3, 27232660), (4, 20424495), (5, 16339596), (6, 13616330), (7, 11671140), (10, 8169798), (12, 6808165), (13, 6284460), (14, 5835570), (15, 5446532), (20, 4084899), (21, 3890380), (26, 3142230), (28, 2917785), (30, 2723266), (35, 2334228), (39, 2094820), (42, 1945190), (52, 1571115), (60, 1361633), (65, 1256892), (70, 1167114), (78, 1047410), (84, 972595), (91, 897780), (105, 778076), (130, 628446), (140, 583557), (156, 523705), (169, 483420), (182, 448890), (195, 418964), (210, 389038), (260, 314223), (273, 299260), (338, 241710), (364, 224445), (390, 209482), (420, 194519), (455, 179556), (507, 161140), (546, 149630), (676, 120855), (780, 104741), (845, 96684), (910, 89778), (1014, 80570), (1092, 74815), (1151, 70980), (1183, 69060), (1365, 59852), (1690, 48342), (1820, 44889), (2028, 40285), (2302, 35490), (2366, 34530), (2535, 32228), (2730, 29926), (3380, 24171), (3453, 23660), (3549, 23020), (4604, 17745), (4732, 17265), (5070, 16114), (5460, 14963), (5755, 14196), (5915, 13812), (6906, 11830), (7098, 11510), (8057, 10140)]