20171978225

素因数分解:

$5^2\times 7^2\times {\mathrm{31}}^1\times {\mathrm{283}}^1\times {\mathrm{1877}}^1$

素因数の和:2215

約数の個数: 72

約数和(自身を含む): 30157855488

約数和(自身を除く): 9985877263

約数列:

[1, 5, 7, 25, 31, 35, 49, 155, 175, 217, 245, 283, 775, 1085, 1225, 1415, 1519, 1877, 1981, 5425, 7075, 7595, 8773, 9385, 9905, 13139, 13867, 37975, 43865, 46925, 49525, 58187, 61411, 65695, 69335, 91973, 219325, 290935, 307055, 328475, 346675, 407309, 429877, 459865, 531191, 1454675, 1535275, 2036545, 2149385, 2299325, 2655955, 2851163, 3718337, 10182725, 10746925, 13279775, 14255815, 16466921, 18591685, 26028359, 71279075, 82334605, 92958425, 115268447, 130141795, 411673025, 576342235, 650708975, 806879129, 2881711175, 4034395645, 20171978225]

約数ペア:

[(1, 20171978225), (5, 4034395645), (7, 2881711175), (25, 806879129), (31, 650708975), (35, 576342235), (49, 411673025), (155, 130141795), (175, 115268447), (217, 92958425), (245, 82334605), (283, 71279075), (775, 26028359), (1085, 18591685), (1225, 16466921), (1415, 14255815), (1519, 13279775), (1877, 10746925), (1981, 10182725), (5425, 3718337), (7075, 2851163), (7595, 2655955), (8773, 2299325), (9385, 2149385), (9905, 2036545), (13139, 1535275), (13867, 1454675), (37975, 531191), (43865, 459865), (46925, 429877), (49525, 407309), (58187, 346675), (61411, 328475), (65695, 307055), (69335, 290935), (91973, 219325)]