21000279775

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{149}}^1\times {\mathrm{401}}^1\times {\mathrm{827}}^1$

素因数の和:1404

約数の個数: 48

約数和(自身を含む): 27860047200

約数和(自身を除く): 6859767425

約数列:

[1, 5, 17, 25, 85, 149, 401, 425, 745, 827, 2005, 2533, 3725, 4135, 6817, 10025, 12665, 14059, 20675, 34085, 59749, 63325, 70295, 123223, 170425, 298745, 331627, 351475, 616115, 1015733, 1493725, 1658135, 2094791, 3080575, 5078665, 5637659, 8290675, 10473955, 25393325, 28188295, 49412423, 52369775, 140941475, 247062115, 840011191, 1235310575, 4200055955, 21000279775]

約数ペア:

[(1, 21000279775), (5, 4200055955), (17, 1235310575), (25, 840011191), (85, 247062115), (149, 140941475), (401, 52369775), (425, 49412423), (745, 28188295), (827, 25393325), (2005, 10473955), (2533, 8290675), (3725, 5637659), (4135, 5078665), (6817, 3080575), (10025, 2094791), (12665, 1658135), (14059, 1493725), (20675, 1015733), (34085, 616115), (59749, 351475), (63325, 331627), (70295, 298745), (123223, 170425)]