261551420

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{89}}^2\times {\mathrm{127}}^1$

素因数の和:327

約数の個数: 72

約数和(自身を含む): 602939904

約数和(自身を除く): 341388484

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 89, 127, 130, 178, 254, 260, 356, 445, 508, 635, 890, 1157, 1270, 1651, 1780, 2314, 2540, 3302, 4628, 5785, 6604, 7921, 8255, 11303, 11570, 15842, 16510, 22606, 23140, 31684, 33020, 39605, 45212, 56515, 79210, 102973, 113030, 146939, 158420, 205946, 226060, 293878, 411892, 514865, 587756, 734695, 1005967, 1029730, 1469390, 2011934, 2059460, 2938780, 4023868, 5029835, 10059670, 13077571, 20119340, 26155142, 52310284, 65387855, 130775710, 261551420]

約数ペア:

[(1, 261551420), (2, 130775710), (4, 65387855), (5, 52310284), (10, 26155142), (13, 20119340), (20, 13077571), (26, 10059670), (52, 5029835), (65, 4023868), (89, 2938780), (127, 2059460), (130, 2011934), (178, 1469390), (254, 1029730), (260, 1005967), (356, 734695), (445, 587756), (508, 514865), (635, 411892), (890, 293878), (1157, 226060), (1270, 205946), (1651, 158420), (1780, 146939), (2314, 113030), (2540, 102973), (3302, 79210), (4628, 56515), (5785, 45212), (6604, 39605), (7921, 33020), (8255, 31684), (11303, 23140), (11570, 22606), (15842, 16510)]