21178590

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{61}}^1\times {\mathrm{71}}^1\times {\mathrm{163}}^1$

素因数の和:305

約数の個数: 64

約数和(自身を含む): 52710912

約数和(自身を除く): 31532322

約数列:

[1, 2, 3, 5, 6, 10, 15, 30, 61, 71, 122, 142, 163, 183, 213, 305, 326, 355, 366, 426, 489, 610, 710, 815, 915, 978, 1065, 1630, 1830, 2130, 2445, 4331, 4890, 8662, 9943, 11573, 12993, 19886, 21655, 23146, 25986, 29829, 34719, 43310, 49715, 57865, 59658, 64965, 69438, 99430, 115730, 129930, 149145, 173595, 298290, 347190, 705953, 1411906, 2117859, 3529765, 4235718, 7059530, 10589295, 21178590]

約数ペア:

[(1, 21178590), (2, 10589295), (3, 7059530), (5, 4235718), (6, 3529765), (10, 2117859), (15, 1411906), (30, 705953), (61, 347190), (71, 298290), (122, 173595), (142, 149145), (163, 129930), (183, 115730), (213, 99430), (305, 69438), (326, 64965), (355, 59658), (366, 57865), (426, 49715), (489, 43310), (610, 34719), (710, 29829), (815, 25986), (915, 23146), (978, 21655), (1065, 19886), (1630, 12993), (1830, 11573), (2130, 9943), (2445, 8662), (4331, 4890)]