20407920

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{211}}^1$

素因数の和:271

約数の個数: 160

約数和(自身を含む): 70662144

約数和(自身を除く): 50254224

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 16, 20, 24, 26, 30, 31, 39, 40, 48, 52, 60, 62, 65, 78, 80, 93, 104, 120, 124, 130, 155, 156, 186, 195, 208, 211, 240, 248, 260, 310, 312, 372, 390, 403, 422, 465, 496, 520, 620, 624, 633, 744, 780, 806, 844, 930, 1040, 1055, 1209, 1240, 1266, 1488, 1560, 1612, 1688, 1860, 2015, 2110, 2418, 2480, 2532, 2743, 3120, 3165, 3224, 3376, 3720, 4030, 4220, 4836, 5064, 5486, 6045, 6330, 6448, 6541, 7440, 8060, 8229, 8440, 9672, 10128, 10972, 12090, 12660, 13082, 13715, 16120, 16458, 16880, 19344, 19623, 21944, 24180, 25320, 26164, 27430, 32240, 32705, 32916, 39246, 41145, 43888, 48360, 50640, 52328, 54860, 65410, 65832, 78492, 82290, 85033, 96720, 98115, 104656, 109720, 130820, 131664, 156984, 164580, 170066, 196230, 219440, 255099, 261640, 313968, 329160, 340132, 392460, 425165, 510198, 523280, 658320, 680264, 784920, 850330, 1020396, 1275495, 1360528, 1569840, 1700660, 2040792, 2550990, 3401320, 4081584, 5101980, 6802640, 10203960, 20407920]

約数ペア:

[(1, 20407920), (2, 10203960), (3, 6802640), (4, 5101980), (5, 4081584), (6, 3401320), (8, 2550990), (10, 2040792), (12, 1700660), (13, 1569840), (15, 1360528), (16, 1275495), (20, 1020396), (24, 850330), (26, 784920), (30, 680264), (31, 658320), (39, 523280), (40, 510198), (48, 425165), (52, 392460), (60, 340132), (62, 329160), (65, 313968), (78, 261640), (80, 255099), (93, 219440), (104, 196230), (120, 170066), (124, 164580), (130, 156984), (155, 131664), (156, 130820), (186, 109720), (195, 104656), (208, 98115), (211, 96720), (240, 85033), (248, 82290), (260, 78492), (310, 65832), (312, 65410), (372, 54860), (390, 52328), (403, 50640), (422, 48360), (465, 43888), (496, 41145), (520, 39246), (620, 32916), (624, 32705), (633, 32240), (744, 27430), (780, 26164), (806, 25320), (844, 24180), (930, 21944), (1040, 19623), (1055, 19344), (1209, 16880), (1240, 16458), (1266, 16120), (1488, 13715), (1560, 13082), (1612, 12660), (1688, 12090), (1860, 10972), (2015, 10128), (2110, 9672), (2418, 8440), (2480, 8229), (2532, 8060), (2743, 7440), (3120, 6541), (3165, 6448), (3224, 6330), (3376, 6045), (3720, 5486), (4030, 5064), (4220, 4836)]