28438025

素因数分解:

$5^2\times 7^1\times {\mathrm{11}}^2\times {\mathrm{17}}^1\times {\mathrm{79}}^1$

素因数の和:135

約数の個数: 72

約数和(自身を含む): 47496960

約数和(自身を除く): 19058935

約数列:

[1, 5, 7, 11, 17, 25, 35, 55, 77, 79, 85, 119, 121, 175, 187, 275, 385, 395, 425, 553, 595, 605, 847, 869, 935, 1309, 1343, 1925, 1975, 2057, 2765, 2975, 3025, 4235, 4345, 4675, 6083, 6545, 6715, 9401, 9559, 10285, 13825, 14399, 14773, 21175, 21725, 30415, 32725, 33575, 47005, 47795, 51425, 66913, 71995, 73865, 103411, 152075, 162503, 235025, 238975, 334565, 359975, 369325, 517055, 812515, 1137521, 1672825, 2585275, 4062575, 5687605, 28438025]

約数ペア:

[(1, 28438025), (5, 5687605), (7, 4062575), (11, 2585275), (17, 1672825), (25, 1137521), (35, 812515), (55, 517055), (77, 369325), (79, 359975), (85, 334565), (119, 238975), (121, 235025), (175, 162503), (187, 152075), (275, 103411), (385, 73865), (395, 71995), (425, 66913), (553, 51425), (595, 47795), (605, 47005), (847, 33575), (869, 32725), (935, 30415), (1309, 21725), (1343, 21175), (1925, 14773), (1975, 14399), (2057, 13825), (2765, 10285), (2975, 9559), (3025, 9401), (4235, 6715), (4345, 6545), (4675, 6083)]