21550425

素因数分解:

$3^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{31}}^2$

素因数の和:111

約数の個数: 72

約数和(自身を含む): 41372352

約数和(自身を除く): 19821927

約数列:

[1, 3, 5, 13, 15, 23, 25, 31, 39, 65, 69, 75, 93, 115, 155, 195, 299, 325, 345, 403, 465, 575, 713, 775, 897, 961, 975, 1209, 1495, 1725, 2015, 2139, 2325, 2883, 3565, 4485, 4805, 6045, 7475, 9269, 10075, 10695, 12493, 14415, 17825, 22103, 22425, 24025, 27807, 30225, 37479, 46345, 53475, 62465, 66309, 72075, 110515, 139035, 187395, 231725, 287339, 312325, 331545, 552575, 695175, 862017, 936975, 1436695, 1657725, 4310085, 7183475, 21550425]

約数ペア:

[(1, 21550425), (3, 7183475), (5, 4310085), (13, 1657725), (15, 1436695), (23, 936975), (25, 862017), (31, 695175), (39, 552575), (65, 331545), (69, 312325), (75, 287339), (93, 231725), (115, 187395), (155, 139035), (195, 110515), (299, 72075), (325, 66309), (345, 62465), (403, 53475), (465, 46345), (575, 37479), (713, 30225), (775, 27807), (897, 24025), (961, 22425), (975, 22103), (1209, 17825), (1495, 14415), (1725, 12493), (2015, 10695), (2139, 10075), (2325, 9269), (2883, 7475), (3565, 6045), (4485, 4805)]