20561325

素因数分解:

$3^1\times 5^2\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{307}}^1$

素因数の和:386

約数の個数: 48

約数和(自身を含む): 36664320

約数和(自身を除く): 16102995

約数列:

[1, 3, 5, 15, 19, 25, 47, 57, 75, 95, 141, 235, 285, 307, 475, 705, 893, 921, 1175, 1425, 1535, 2679, 3525, 4465, 4605, 5833, 7675, 13395, 14429, 17499, 22325, 23025, 29165, 43287, 66975, 72145, 87495, 145825, 216435, 274151, 360725, 437475, 822453, 1082175, 1370755, 4112265, 6853775, 20561325]

約数ペア:

[(1, 20561325), (3, 6853775), (5, 4112265), (15, 1370755), (19, 1082175), (25, 822453), (47, 437475), (57, 360725), (75, 274151), (95, 216435), (141, 145825), (235, 87495), (285, 72145), (307, 66975), (475, 43287), (705, 29165), (893, 23025), (921, 22325), (1175, 17499), (1425, 14429), (1535, 13395), (2679, 7675), (3525, 5833), (4465, 4605)]