661779728

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{127}}^1\times {\mathrm{281}}^1$

素因数の和:496

約数の個数: 80

約数和(自身を含む): 1387530240

約数和(自身を除く): 725750512

約数列:

[1, 2, 4, 8, 16, 19, 38, 61, 76, 122, 127, 152, 244, 254, 281, 304, 488, 508, 562, 976, 1016, 1124, 1159, 2032, 2248, 2318, 2413, 4496, 4636, 4826, 5339, 7747, 9272, 9652, 10678, 15494, 17141, 18544, 19304, 21356, 30988, 34282, 35687, 38608, 42712, 61976, 68564, 71374, 85424, 123952, 137128, 142748, 147193, 274256, 285496, 294386, 325679, 570992, 588772, 651358, 678053, 1177544, 1302716, 1356106, 2176907, 2355088, 2605432, 2712212, 4353814, 5210864, 5424424, 8707628, 10848848, 17415256, 34830512, 41361233, 82722466, 165444932, 330889864, 661779728]

約数ペア:

[(1, 661779728), (2, 330889864), (4, 165444932), (8, 82722466), (16, 41361233), (19, 34830512), (38, 17415256), (61, 10848848), (76, 8707628), (122, 5424424), (127, 5210864), (152, 4353814), (244, 2712212), (254, 2605432), (281, 2355088), (304, 2176907), (488, 1356106), (508, 1302716), (562, 1177544), (976, 678053), (1016, 651358), (1124, 588772), (1159, 570992), (2032, 325679), (2248, 294386), (2318, 285496), (2413, 274256), (4496, 147193), (4636, 142748), (4826, 137128), (5339, 123952), (7747, 85424), (9272, 71374), (9652, 68564), (10678, 61976), (15494, 42712), (17141, 38608), (18544, 35687), (19304, 34282), (21356, 30988)]