20768216

素因数分解:

$2^3\times 7^1\times {\mathrm{19}}^1\times {\mathrm{131}}^1\times {\mathrm{149}}^1$

素因数の和:312

約数の個数: 64

約数和(自身を含む): 47520000

約数和(自身を除く): 26751784

約数列:

[1, 2, 4, 7, 8, 14, 19, 28, 38, 56, 76, 131, 133, 149, 152, 262, 266, 298, 524, 532, 596, 917, 1043, 1048, 1064, 1192, 1834, 2086, 2489, 2831, 3668, 4172, 4978, 5662, 7336, 8344, 9956, 11324, 17423, 19519, 19817, 19912, 22648, 34846, 39038, 39634, 69692, 78076, 79268, 136633, 139384, 156152, 158536, 273266, 370861, 546532, 741722, 1093064, 1483444, 2596027, 2966888, 5192054, 10384108, 20768216]

約数ペア:

[(1, 20768216), (2, 10384108), (4, 5192054), (7, 2966888), (8, 2596027), (14, 1483444), (19, 1093064), (28, 741722), (38, 546532), (56, 370861), (76, 273266), (131, 158536), (133, 156152), (149, 139384), (152, 136633), (262, 79268), (266, 78076), (298, 69692), (524, 39634), (532, 39038), (596, 34846), (917, 22648), (1043, 19912), (1048, 19817), (1064, 19519), (1192, 17423), (1834, 11324), (2086, 9956), (2489, 8344), (2831, 7336), (3668, 5662), (4172, 4978)]