261760240

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{20323}}^1$

素因数の和:20366

約数の個数: 80

約数和(自身を含む): 725810688

約数和(自身を除く): 464050448

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 23, 28, 35, 40, 46, 56, 70, 80, 92, 112, 115, 140, 161, 184, 230, 280, 322, 368, 460, 560, 644, 805, 920, 1288, 1610, 1840, 2576, 3220, 6440, 12880, 20323, 40646, 81292, 101615, 142261, 162584, 203230, 284522, 325168, 406460, 467429, 569044, 711305, 812920, 934858, 1138088, 1422610, 1625840, 1869716, 2276176, 2337145, 2845220, 3272003, 3739432, 4674290, 5690440, 6544006, 7478864, 9348580, 11380880, 13088012, 16360015, 18697160, 26176024, 32720030, 37394320, 52352048, 65440060, 130880120, 261760240]

約数ペア:

[(1, 261760240), (2, 130880120), (4, 65440060), (5, 52352048), (7, 37394320), (8, 32720030), (10, 26176024), (14, 18697160), (16, 16360015), (20, 13088012), (23, 11380880), (28, 9348580), (35, 7478864), (40, 6544006), (46, 5690440), (56, 4674290), (70, 3739432), (80, 3272003), (92, 2845220), (112, 2337145), (115, 2276176), (140, 1869716), (161, 1625840), (184, 1422610), (230, 1138088), (280, 934858), (322, 812920), (368, 711305), (460, 569044), (560, 467429), (644, 406460), (805, 325168), (920, 284522), (1288, 203230), (1610, 162584), (1840, 142261), (2576, 101615), (3220, 81292), (6440, 40646), (12880, 20323)]