81960340

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{7603}}^1$

素因数の和:7637

約数の個数: 72

約数和(自身を含む): 218447712

約数和(自身を除く): 136487372

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 28, 35, 44, 49, 55, 70, 77, 98, 110, 140, 154, 196, 220, 245, 308, 385, 490, 539, 770, 980, 1078, 1540, 2156, 2695, 5390, 7603, 10780, 15206, 30412, 38015, 53221, 76030, 83633, 106442, 152060, 167266, 212884, 266105, 334532, 372547, 418165, 532210, 585431, 745094, 836330, 1064420, 1170862, 1490188, 1672660, 1862735, 2341724, 2927155, 3725470, 4098017, 5854310, 7450940, 8196034, 11708620, 16392068, 20490085, 40980170, 81960340]

約数ペア:

[(1, 81960340), (2, 40980170), (4, 20490085), (5, 16392068), (7, 11708620), (10, 8196034), (11, 7450940), (14, 5854310), (20, 4098017), (22, 3725470), (28, 2927155), (35, 2341724), (44, 1862735), (49, 1672660), (55, 1490188), (70, 1170862), (77, 1064420), (98, 836330), (110, 745094), (140, 585431), (154, 532210), (196, 418165), (220, 372547), (245, 334532), (308, 266105), (385, 212884), (490, 167266), (539, 152060), (770, 106442), (980, 83633), (1078, 76030), (1540, 53221), (2156, 38015), (2695, 30412), (5390, 15206), (7603, 10780)]