81977490

素因数分解:

$2^1\times 3^2\times 5^1\times 7^2\times {\mathrm{29}}^1\times {\mathrm{641}}^1$

素因数の和:697

約数の個数: 144

約数和(自身を含む): 256889880

約数和(自身を除く): 174912390

約数列:

[1, 2, 3, 5, 6, 7, 9, 10, 14, 15, 18, 21, 29, 30, 35, 42, 45, 49, 58, 63, 70, 87, 90, 98, 105, 126, 145, 147, 174, 203, 210, 245, 261, 290, 294, 315, 406, 435, 441, 490, 522, 609, 630, 641, 735, 870, 882, 1015, 1218, 1282, 1305, 1421, 1470, 1827, 1923, 2030, 2205, 2610, 2842, 3045, 3205, 3654, 3846, 4263, 4410, 4487, 5769, 6090, 6410, 7105, 8526, 8974, 9135, 9615, 11538, 12789, 13461, 14210, 18270, 18589, 19230, 21315, 22435, 25578, 26922, 28845, 31409, 37178, 40383, 42630, 44870, 55767, 57690, 62818, 63945, 67305, 80766, 92945, 94227, 111534, 127890, 130123, 134610, 157045, 167301, 185890, 188454, 201915, 260246, 278835, 282681, 314090, 334602, 390369, 403830, 471135, 557670, 565362, 650615, 780738, 836505, 910861, 942270, 1171107, 1301230, 1413405, 1673010, 1821722, 1951845, 2342214, 2732583, 2826810, 3903690, 4554305, 5465166, 5855535, 8197749, 9108610, 11711070, 13662915, 16395498, 27325830, 40988745, 81977490]

約数ペア:

[(1, 81977490), (2, 40988745), (3, 27325830), (5, 16395498), (6, 13662915), (7, 11711070), (9, 9108610), (10, 8197749), (14, 5855535), (15, 5465166), (18, 4554305), (21, 3903690), (29, 2826810), (30, 2732583), (35, 2342214), (42, 1951845), (45, 1821722), (49, 1673010), (58, 1413405), (63, 1301230), (70, 1171107), (87, 942270), (90, 910861), (98, 836505), (105, 780738), (126, 650615), (145, 565362), (147, 557670), (174, 471135), (203, 403830), (210, 390369), (245, 334602), (261, 314090), (290, 282681), (294, 278835), (315, 260246), (406, 201915), (435, 188454), (441, 185890), (490, 167301), (522, 157045), (609, 134610), (630, 130123), (641, 127890), (735, 111534), (870, 94227), (882, 92945), (1015, 80766), (1218, 67305), (1282, 63945), (1305, 62818), (1421, 57690), (1470, 55767), (1827, 44870), (1923, 42630), (2030, 40383), (2205, 37178), (2610, 31409), (2842, 28845), (3045, 26922), (3205, 25578), (3654, 22435), (3846, 21315), (4263, 19230), (4410, 18589), (4487, 18270), (5769, 14210), (6090, 13461), (6410, 12789), (7105, 11538), (8526, 9615), (8974, 9135)]