81868220

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{139}}^1\times {\mathrm{601}}^1$

素因数の和:763

約数の個数: 72

約数和(自身を含む): 201766320

約数和(自身を除く): 119898100

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 139, 140, 196, 245, 278, 490, 556, 601, 695, 973, 980, 1202, 1390, 1946, 2404, 2780, 3005, 3892, 4207, 4865, 6010, 6811, 8414, 9730, 12020, 13622, 16828, 19460, 21035, 27244, 29449, 34055, 42070, 58898, 68110, 83539, 84140, 117796, 136220, 147245, 167078, 294490, 334156, 417695, 584773, 588980, 835390, 1169546, 1670780, 2339092, 2923865, 4093411, 5847730, 8186822, 11695460, 16373644, 20467055, 40934110, 81868220]

約数ペア:

[(1, 81868220), (2, 40934110), (4, 20467055), (5, 16373644), (7, 11695460), (10, 8186822), (14, 5847730), (20, 4093411), (28, 2923865), (35, 2339092), (49, 1670780), (70, 1169546), (98, 835390), (139, 588980), (140, 584773), (196, 417695), (245, 334156), (278, 294490), (490, 167078), (556, 147245), (601, 136220), (695, 117796), (973, 84140), (980, 83539), (1202, 68110), (1390, 58898), (1946, 42070), (2404, 34055), (2780, 29449), (3005, 27244), (3892, 21035), (4207, 19460), (4865, 16828), (6010, 13622), (6811, 12020), (8414, 9730)]