21467720

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{601}}^1$

素因数の和:678

約数の個数: 64

約数和(自身を含む): 52012800

約数和(自身を除く): 30545080

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 47, 76, 94, 95, 152, 188, 190, 235, 376, 380, 470, 601, 760, 893, 940, 1202, 1786, 1880, 2404, 3005, 3572, 4465, 4808, 6010, 7144, 8930, 11419, 12020, 17860, 22838, 24040, 28247, 35720, 45676, 56494, 57095, 91352, 112988, 114190, 141235, 225976, 228380, 282470, 456760, 536693, 564940, 1073386, 1129880, 2146772, 2683465, 4293544, 5366930, 10733860, 21467720]

約数ペア:

[(1, 21467720), (2, 10733860), (4, 5366930), (5, 4293544), (8, 2683465), (10, 2146772), (19, 1129880), (20, 1073386), (38, 564940), (40, 536693), (47, 456760), (76, 282470), (94, 228380), (95, 225976), (152, 141235), (188, 114190), (190, 112988), (235, 91352), (376, 57095), (380, 56494), (470, 45676), (601, 35720), (760, 28247), (893, 24040), (940, 22838), (1202, 17860), (1786, 12020), (1880, 11419), (2404, 8930), (3005, 7144), (3572, 6010), (4465, 4808)]