21625040

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{347}}^1$

素因数の和:420

約数の個数: 80

約数和(自身を含む): 54371520

約数和(自身を除く): 32746480

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 41, 76, 80, 82, 95, 152, 164, 190, 205, 304, 328, 347, 380, 410, 656, 694, 760, 779, 820, 1388, 1520, 1558, 1640, 1735, 2776, 3116, 3280, 3470, 3895, 5552, 6232, 6593, 6940, 7790, 12464, 13186, 13880, 14227, 15580, 26372, 27760, 28454, 31160, 32965, 52744, 56908, 62320, 65930, 71135, 105488, 113816, 131860, 142270, 227632, 263720, 270313, 284540, 527440, 540626, 569080, 1081252, 1138160, 1351565, 2162504, 2703130, 4325008, 5406260, 10812520, 21625040]

約数ペア:

[(1, 21625040), (2, 10812520), (4, 5406260), (5, 4325008), (8, 2703130), (10, 2162504), (16, 1351565), (19, 1138160), (20, 1081252), (38, 569080), (40, 540626), (41, 527440), (76, 284540), (80, 270313), (82, 263720), (95, 227632), (152, 142270), (164, 131860), (190, 113816), (205, 105488), (304, 71135), (328, 65930), (347, 62320), (380, 56908), (410, 52744), (656, 32965), (694, 31160), (760, 28454), (779, 27760), (820, 26372), (1388, 15580), (1520, 14227), (1558, 13880), (1640, 13186), (1735, 12464), (2776, 7790), (3116, 6940), (3280, 6593), (3470, 6232), (3895, 5552)]