642921820

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{59}}^1\times {\mathrm{97}}^1\times {\mathrm{137}}^1$

素因数の和:343

約数の個数: 96

約数和(自身を含む): 1431380160

約数和(自身を除く): 788458340

約数列:

[1, 2, 4, 5, 10, 20, 41, 59, 82, 97, 118, 137, 164, 194, 205, 236, 274, 295, 388, 410, 485, 548, 590, 685, 820, 970, 1180, 1370, 1940, 2419, 2740, 3977, 4838, 5617, 5723, 7954, 8083, 9676, 11234, 11446, 12095, 13289, 15908, 16166, 19885, 22468, 22892, 24190, 26578, 28085, 28615, 32332, 39770, 40415, 48380, 53156, 56170, 57230, 66445, 79540, 80830, 112340, 114460, 132890, 161660, 234643, 265780, 331403, 469286, 544849, 662806, 784051, 938572, 1089698, 1173215, 1325612, 1568102, 1657015, 2179396, 2346430, 2724245, 3136204, 3314030, 3920255, 4692860, 5448490, 6628060, 7840510, 10896980, 15681020, 32146091, 64292182, 128584364, 160730455, 321460910, 642921820]

約数ペア:

[(1, 642921820), (2, 321460910), (4, 160730455), (5, 128584364), (10, 64292182), (20, 32146091), (41, 15681020), (59, 10896980), (82, 7840510), (97, 6628060), (118, 5448490), (137, 4692860), (164, 3920255), (194, 3314030), (205, 3136204), (236, 2724245), (274, 2346430), (295, 2179396), (388, 1657015), (410, 1568102), (485, 1325612), (548, 1173215), (590, 1089698), (685, 938572), (820, 784051), (970, 662806), (1180, 544849), (1370, 469286), (1940, 331403), (2419, 265780), (2740, 234643), (3977, 161660), (4838, 132890), (5617, 114460), (5723, 112340), (7954, 80830), (8083, 79540), (9676, 66445), (11234, 57230), (11446, 56170), (12095, 53156), (13289, 48380), (15908, 40415), (16166, 39770), (19885, 32332), (22468, 28615), (22892, 28085), (24190, 26578)]