81971297940

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{641}}^1\times {\mathrm{304477}}^1$

素因数の和:305137

約数の個数: 96

約数和(自身を含む): 262718233344

約数和(自身を除く): 180746935404

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420, 641, 1282, 1923, 2564, 3205, 3846, 4487, 6410, 7692, 8974, 9615, 12820, 13461, 17948, 19230, 22435, 26922, 38460, 44870, 53844, 67305, 89740, 134610, 269220, 304477, 608954, 913431, 1217908, 1522385, 1826862, 2131339, 3044770, 3653724, 4262678, 4567155, 6089540, 6394017, 8525356, 9134310, 10656695, 12788034, 18268620, 21313390, 25576068, 31970085, 42626780, 63940170, 127880340, 195169757, 390339514, 585509271, 780679028, 975848785, 1171018542, 1366188299, 1951697570, 2342037084, 2732376598, 2927546355, 3903395140, 4098564897, 5464753196, 5855092710, 6830941495, 8197129794, 11710185420, 13661882990, 16394259588, 20492824485, 27323765980, 40985648970, 81971297940]

約数ペア:

[(1, 81971297940), (2, 40985648970), (3, 27323765980), (4, 20492824485), (5, 16394259588), (6, 13661882990), (7, 11710185420), (10, 8197129794), (12, 6830941495), (14, 5855092710), (15, 5464753196), (20, 4098564897), (21, 3903395140), (28, 2927546355), (30, 2732376598), (35, 2342037084), (42, 1951697570), (60, 1366188299), (70, 1171018542), (84, 975848785), (105, 780679028), (140, 585509271), (210, 390339514), (420, 195169757), (641, 127880340), (1282, 63940170), (1923, 42626780), (2564, 31970085), (3205, 25576068), (3846, 21313390), (4487, 18268620), (6410, 12788034), (7692, 10656695), (8974, 9134310), (9615, 8525356), (12820, 6394017), (13461, 6089540), (17948, 4567155), (19230, 4262678), (22435, 3653724), (26922, 3044770), (38460, 2131339), (44870, 1826862), (53844, 1522385), (67305, 1217908), (89740, 913431), (134610, 608954), (269220, 304477)]