81199860

素因数分解:

$2^2\times 3^1\times 5^1\times 7^2\times {\mathrm{71}}^1\times {\mathrm{389}}^1$

素因数の和:486

約数の個数: 144

約数和(自身を含む): 268894080

約数和(自身を除く): 187694220

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 49, 60, 70, 71, 84, 98, 105, 140, 142, 147, 196, 210, 213, 245, 284, 294, 355, 389, 420, 426, 490, 497, 588, 710, 735, 778, 852, 980, 994, 1065, 1167, 1420, 1470, 1491, 1556, 1945, 1988, 2130, 2334, 2485, 2723, 2940, 2982, 3479, 3890, 4260, 4668, 4970, 5446, 5835, 5964, 6958, 7455, 7780, 8169, 9940, 10437, 10892, 11670, 13615, 13916, 14910, 16338, 17395, 19061, 20874, 23340, 27230, 27619, 29820, 32676, 34790, 38122, 40845, 41748, 52185, 54460, 55238, 57183, 69580, 76244, 81690, 82857, 95305, 104370, 110476, 114366, 138095, 163380, 165714, 190610, 193333, 208740, 228732, 276190, 285915, 331428, 381220, 386666, 414285, 552380, 571830, 579999, 773332, 828570, 966665, 1143660, 1159998, 1353331, 1657140, 1933330, 2319996, 2706662, 2899995, 3866660, 4059993, 5413324, 5799990, 6766655, 8119986, 11599980, 13533310, 16239972, 20299965, 27066620, 40599930, 81199860]

約数ペア:

[(1, 81199860), (2, 40599930), (3, 27066620), (4, 20299965), (5, 16239972), (6, 13533310), (7, 11599980), (10, 8119986), (12, 6766655), (14, 5799990), (15, 5413324), (20, 4059993), (21, 3866660), (28, 2899995), (30, 2706662), (35, 2319996), (42, 1933330), (49, 1657140), (60, 1353331), (70, 1159998), (71, 1143660), (84, 966665), (98, 828570), (105, 773332), (140, 579999), (142, 571830), (147, 552380), (196, 414285), (210, 386666), (213, 381220), (245, 331428), (284, 285915), (294, 276190), (355, 228732), (389, 208740), (420, 193333), (426, 190610), (490, 165714), (497, 163380), (588, 138095), (710, 114366), (735, 110476), (778, 104370), (852, 95305), (980, 82857), (994, 81690), (1065, 76244), (1167, 69580), (1420, 57183), (1470, 55238), (1491, 54460), (1556, 52185), (1945, 41748), (1988, 40845), (2130, 38122), (2334, 34790), (2485, 32676), (2723, 29820), (2940, 27619), (2982, 27230), (3479, 23340), (3890, 20874), (4260, 19061), (4668, 17395), (4970, 16338), (5446, 14910), (5835, 13916), (5964, 13615), (6958, 11670), (7455, 10892), (7780, 10437), (8169, 9940)]