20616780

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{61}}^1\times {\mathrm{131}}^1$

素因数の和:247

約数の個数: 96

約数和(自身を含む): 60496128

約数和(自身を除く): 39879348

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 43, 60, 61, 86, 122, 129, 131, 172, 183, 215, 244, 258, 262, 305, 366, 393, 430, 516, 524, 610, 645, 655, 732, 786, 860, 915, 1220, 1290, 1310, 1572, 1830, 1965, 2580, 2620, 2623, 3660, 3930, 5246, 5633, 7860, 7869, 7991, 10492, 11266, 13115, 15738, 15982, 16899, 22532, 23973, 26230, 28165, 31476, 31964, 33798, 39345, 39955, 47946, 52460, 56330, 67596, 78690, 79910, 84495, 95892, 112660, 119865, 157380, 159820, 168990, 239730, 337980, 343613, 479460, 687226, 1030839, 1374452, 1718065, 2061678, 3436130, 4123356, 5154195, 6872260, 10308390, 20616780]

約数ペア:

[(1, 20616780), (2, 10308390), (3, 6872260), (4, 5154195), (5, 4123356), (6, 3436130), (10, 2061678), (12, 1718065), (15, 1374452), (20, 1030839), (30, 687226), (43, 479460), (60, 343613), (61, 337980), (86, 239730), (122, 168990), (129, 159820), (131, 157380), (172, 119865), (183, 112660), (215, 95892), (244, 84495), (258, 79910), (262, 78690), (305, 67596), (366, 56330), (393, 52460), (430, 47946), (516, 39955), (524, 39345), (610, 33798), (645, 31964), (655, 31476), (732, 28165), (786, 26230), (860, 23973), (915, 22532), (1220, 16899), (1290, 15982), (1310, 15738), (1572, 13115), (1830, 11266), (1965, 10492), (2580, 7991), (2620, 7869), (2623, 7860), (3660, 5633), (3930, 5246)]