21514775

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1$

素因数の和:152

約数の個数: 48

約数和(自身を含む): 30855168

約数和(自身を除く): 9340393

約数列:

[1, 5, 17, 23, 25, 31, 71, 85, 115, 155, 355, 391, 425, 527, 575, 713, 775, 1207, 1633, 1775, 1955, 2201, 2635, 3565, 6035, 8165, 9775, 11005, 12121, 13175, 17825, 27761, 30175, 37417, 40825, 50623, 55025, 60605, 138805, 187085, 253115, 303025, 694025, 860591, 935425, 1265575, 4302955, 21514775]

約数ペア:

[(1, 21514775), (5, 4302955), (17, 1265575), (23, 935425), (25, 860591), (31, 694025), (71, 303025), (85, 253115), (115, 187085), (155, 138805), (355, 60605), (391, 55025), (425, 50623), (527, 40825), (575, 37417), (713, 30175), (775, 27761), (1207, 17825), (1633, 13175), (1775, 12121), (1955, 11005), (2201, 9775), (2635, 8165), (3565, 6035)]