21407420

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{79}}^1\times {\mathrm{797}}^1$

素因数の和:902

約数の個数: 48

約数和(自身を含む): 48263040

約数和(自身を除く): 26855620

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 79, 85, 158, 170, 316, 340, 395, 790, 797, 1343, 1580, 1594, 2686, 3188, 3985, 5372, 6715, 7970, 13430, 13549, 15940, 26860, 27098, 54196, 62963, 67745, 125926, 135490, 251852, 270980, 314815, 629630, 1070371, 1259260, 2140742, 4281484, 5351855, 10703710, 21407420]

約数ペア:

[(1, 21407420), (2, 10703710), (4, 5351855), (5, 4281484), (10, 2140742), (17, 1259260), (20, 1070371), (34, 629630), (68, 314815), (79, 270980), (85, 251852), (158, 135490), (170, 125926), (316, 67745), (340, 62963), (395, 54196), (790, 27098), (797, 26860), (1343, 15940), (1580, 13549), (1594, 13430), (2686, 7970), (3188, 6715), (3985, 5372)]