21653920

素因数分解:

$2^5\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{419}}^1$

素因数の和:470

約数の個数: 96

約数和(自身を含む): 57153600

約数和(自身を除く): 35499680

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 19, 20, 32, 34, 38, 40, 68, 76, 80, 85, 95, 136, 152, 160, 170, 190, 272, 304, 323, 340, 380, 419, 544, 608, 646, 680, 760, 838, 1292, 1360, 1520, 1615, 1676, 2095, 2584, 2720, 3040, 3230, 3352, 4190, 5168, 6460, 6704, 7123, 7961, 8380, 10336, 12920, 13408, 14246, 15922, 16760, 25840, 28492, 31844, 33520, 35615, 39805, 51680, 56984, 63688, 67040, 71230, 79610, 113968, 127376, 135337, 142460, 159220, 227936, 254752, 270674, 284920, 318440, 541348, 569840, 636880, 676685, 1082696, 1139680, 1273760, 1353370, 2165392, 2706740, 4330784, 5413480, 10826960, 21653920]

約数ペア:

[(1, 21653920), (2, 10826960), (4, 5413480), (5, 4330784), (8, 2706740), (10, 2165392), (16, 1353370), (17, 1273760), (19, 1139680), (20, 1082696), (32, 676685), (34, 636880), (38, 569840), (40, 541348), (68, 318440), (76, 284920), (80, 270674), (85, 254752), (95, 227936), (136, 159220), (152, 142460), (160, 135337), (170, 127376), (190, 113968), (272, 79610), (304, 71230), (323, 67040), (340, 63688), (380, 56984), (419, 51680), (544, 39805), (608, 35615), (646, 33520), (680, 31844), (760, 28492), (838, 25840), (1292, 16760), (1360, 15922), (1520, 14246), (1615, 13408), (1676, 12920), (2095, 10336), (2584, 8380), (2720, 7961), (3040, 7123), (3230, 6704), (3352, 6460), (4190, 5168)]