21106720

素因数分解:

$2^5\times 5^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{131}}^1$

素因数の和:218

約数の個数: 96

約数和(自身を含む): 53887680

約数和(自身を除く): 32780960

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 32, 38, 40, 53, 76, 80, 95, 106, 131, 152, 160, 190, 212, 262, 265, 304, 380, 424, 524, 530, 608, 655, 760, 848, 1007, 1048, 1060, 1310, 1520, 1696, 2014, 2096, 2120, 2489, 2620, 3040, 4028, 4192, 4240, 4978, 5035, 5240, 6943, 8056, 8480, 9956, 10070, 10480, 12445, 13886, 16112, 19912, 20140, 20960, 24890, 27772, 32224, 34715, 39824, 40280, 49780, 55544, 69430, 79648, 80560, 99560, 111088, 131917, 138860, 161120, 199120, 222176, 263834, 277720, 398240, 527668, 555440, 659585, 1055336, 1110880, 1319170, 2110672, 2638340, 4221344, 5276680, 10553360, 21106720]

約数ペア:

[(1, 21106720), (2, 10553360), (4, 5276680), (5, 4221344), (8, 2638340), (10, 2110672), (16, 1319170), (19, 1110880), (20, 1055336), (32, 659585), (38, 555440), (40, 527668), (53, 398240), (76, 277720), (80, 263834), (95, 222176), (106, 199120), (131, 161120), (152, 138860), (160, 131917), (190, 111088), (212, 99560), (262, 80560), (265, 79648), (304, 69430), (380, 55544), (424, 49780), (524, 40280), (530, 39824), (608, 34715), (655, 32224), (760, 27772), (848, 24890), (1007, 20960), (1048, 20140), (1060, 19912), (1310, 16112), (1520, 13886), (1696, 12445), (2014, 10480), (2096, 10070), (2120, 9956), (2489, 8480), (2620, 8056), (3040, 6943), (4028, 5240), (4192, 5035), (4240, 4978)]