21661280

素因数分解:

$2^5\times 5^1\times {\mathrm{37}}^1\times {\mathrm{3659}}^1$

素因数の和:3711

約数の個数: 48

約数和(自身を含む): 52572240

約数和(自身を除く): 30910960

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 37, 40, 74, 80, 148, 160, 185, 296, 370, 592, 740, 1184, 1480, 2960, 3659, 5920, 7318, 14636, 18295, 29272, 36590, 58544, 73180, 117088, 135383, 146360, 270766, 292720, 541532, 585440, 676915, 1083064, 1353830, 2166128, 2707660, 4332256, 5415320, 10830640, 21661280]

約数ペア:

[(1, 21661280), (2, 10830640), (4, 5415320), (5, 4332256), (8, 2707660), (10, 2166128), (16, 1353830), (20, 1083064), (32, 676915), (37, 585440), (40, 541532), (74, 292720), (80, 270766), (148, 146360), (160, 135383), (185, 117088), (296, 73180), (370, 58544), (592, 36590), (740, 29272), (1184, 18295), (1480, 14636), (2960, 7318), (3659, 5920)]