81289040

素因数分解:

$2^4\times 5^1\times 7^2\times {\mathrm{89}}^1\times {\mathrm{233}}^1$

素因数の和:349

約数の個数: 120

約数和(自身を含む): 223278120

約数和(自身を除く): 141989080

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 49, 56, 70, 80, 89, 98, 112, 140, 178, 196, 233, 245, 280, 356, 392, 445, 466, 490, 560, 623, 712, 784, 890, 932, 980, 1165, 1246, 1424, 1631, 1780, 1864, 1960, 2330, 2492, 3115, 3262, 3560, 3728, 3920, 4361, 4660, 4984, 6230, 6524, 7120, 8155, 8722, 9320, 9968, 11417, 12460, 13048, 16310, 17444, 18640, 20737, 21805, 22834, 24920, 26096, 32620, 34888, 41474, 43610, 45668, 49840, 57085, 65240, 69776, 82948, 87220, 91336, 103685, 114170, 130480, 145159, 165896, 174440, 182672, 207370, 228340, 290318, 331792, 348880, 414740, 456680, 580636, 725795, 829480, 913360, 1016113, 1161272, 1451590, 1658960, 2032226, 2322544, 2903180, 4064452, 5080565, 5806360, 8128904, 10161130, 11612720, 16257808, 20322260, 40644520, 81289040]

約数ペア:

[(1, 81289040), (2, 40644520), (4, 20322260), (5, 16257808), (7, 11612720), (8, 10161130), (10, 8128904), (14, 5806360), (16, 5080565), (20, 4064452), (28, 2903180), (35, 2322544), (40, 2032226), (49, 1658960), (56, 1451590), (70, 1161272), (80, 1016113), (89, 913360), (98, 829480), (112, 725795), (140, 580636), (178, 456680), (196, 414740), (233, 348880), (245, 331792), (280, 290318), (356, 228340), (392, 207370), (445, 182672), (466, 174440), (490, 165896), (560, 145159), (623, 130480), (712, 114170), (784, 103685), (890, 91336), (932, 87220), (980, 82948), (1165, 69776), (1246, 65240), (1424, 57085), (1631, 49840), (1780, 45668), (1864, 43610), (1960, 41474), (2330, 34888), (2492, 32620), (3115, 26096), (3262, 24920), (3560, 22834), (3728, 21805), (3920, 20737), (4361, 18640), (4660, 17444), (4984, 16310), (6230, 13048), (6524, 12460), (7120, 11417), (8155, 9968), (8722, 9320)]