20516960

素因数分解:

$2^5\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{397}}^1$

素因数の和:448

約数の個数: 96

約数和(自身を含む): 54159840

約数和(自身を除く): 33642880

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, 397, 544, 608, 646, 680, 760, 794, 1292, 1360, 1520, 1588, 1615, 1985, 2584, 2720, 3040, 3176, 3230, 3970, 5168, 6352, 6460, 6749, 7543, 7940, 10336, 12704, 12920, 13498, 15086, 15880, 25840, 26996, 30172, 31760, 33745, 37715, 51680, 53992, 60344, 63520, 67490, 75430, 107984, 120688, 128231, 134980, 150860, 215968, 241376, 256462, 269960, 301720, 512924, 539920, 603440, 641155, 1025848, 1079840, 1206880, 1282310, 2051696, 2564620, 4103392, 5129240, 10258480, 20516960]

約数ペア:

[(1, 20516960), (2, 10258480), (4, 5129240), (5, 4103392), (8, 2564620), (10, 2051696), (16, 1282310), (17, 1206880), (19, 1079840), (20, 1025848), (32, 641155), (34, 603440), (38, 539920), (40, 512924), (68, 301720), (76, 269960), (80, 256462), (85, 241376), (95, 215968), (136, 150860), (152, 134980), (160, 128231), (170, 120688), (190, 107984), (272, 75430), (304, 67490), (323, 63520), (340, 60344), (380, 53992), (397, 51680), (544, 37715), (608, 33745), (646, 31760), (680, 30172), (760, 26996), (794, 25840), (1292, 15880), (1360, 15086), (1520, 13498), (1588, 12920), (1615, 12704), (1985, 10336), (2584, 7940), (2720, 7543), (3040, 6749), (3176, 6460), (3230, 6352), (3970, 5168)]