21987308

素因数分解:

$2^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{73}}^1\times {\mathrm{347}}^1$

素因数の和:462

約数の個数: 48

約数和(自身を含む): 46147584

約数和(自身を除く): 24160276

約数列:

[1, 2, 4, 7, 14, 28, 31, 62, 73, 124, 146, 217, 292, 347, 434, 511, 694, 868, 1022, 1388, 2044, 2263, 2429, 4526, 4858, 9052, 9716, 10757, 15841, 21514, 25331, 31682, 43028, 50662, 63364, 75299, 101324, 150598, 177317, 301196, 354634, 709268, 785261, 1570522, 3141044, 5496827, 10993654, 21987308]

約数ペア:

[(1, 21987308), (2, 10993654), (4, 5496827), (7, 3141044), (14, 1570522), (28, 785261), (31, 709268), (62, 354634), (73, 301196), (124, 177317), (146, 150598), (217, 101324), (292, 75299), (347, 63364), (434, 50662), (511, 43028), (694, 31682), (868, 25331), (1022, 21514), (1388, 15841), (2044, 10757), (2263, 9716), (2429, 9052), (4526, 4858)]