20709808

素因数分解:

$2^4\times 7^1\times {\mathrm{17}}^1\times {\mathrm{73}}^1\times {\mathrm{149}}^1$

素因数の和:254

約数の個数: 80

約数和(自身を含む): 49550400

約数和(自身を除く): 28840592

約数列:

[1, 2, 4, 7, 8, 14, 16, 17, 28, 34, 56, 68, 73, 112, 119, 136, 146, 149, 238, 272, 292, 298, 476, 511, 584, 596, 952, 1022, 1043, 1168, 1192, 1241, 1904, 2044, 2086, 2384, 2482, 2533, 4088, 4172, 4964, 5066, 8176, 8344, 8687, 9928, 10132, 10877, 16688, 17374, 17731, 19856, 20264, 21754, 34748, 35462, 40528, 43508, 69496, 70924, 76139, 87016, 138992, 141848, 152278, 174032, 184909, 283696, 304556, 369818, 609112, 739636, 1218224, 1294363, 1479272, 2588726, 2958544, 5177452, 10354904, 20709808]

約数ペア:

[(1, 20709808), (2, 10354904), (4, 5177452), (7, 2958544), (8, 2588726), (14, 1479272), (16, 1294363), (17, 1218224), (28, 739636), (34, 609112), (56, 369818), (68, 304556), (73, 283696), (112, 184909), (119, 174032), (136, 152278), (146, 141848), (149, 138992), (238, 87016), (272, 76139), (292, 70924), (298, 69496), (476, 43508), (511, 40528), (584, 35462), (596, 34748), (952, 21754), (1022, 20264), (1043, 19856), (1168, 17731), (1192, 17374), (1241, 16688), (1904, 10877), (2044, 10132), (2086, 9928), (2384, 8687), (2482, 8344), (2533, 8176), (4088, 5066), (4172, 4964)]