81423980

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{11939}}^1$

素因数の和:11990

約数の個数: 48

約数和(自身を含む): 192568320

約数和(自身を除く): 111144340

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 31, 44, 55, 62, 110, 124, 155, 220, 310, 341, 620, 682, 1364, 1705, 3410, 6820, 11939, 23878, 47756, 59695, 119390, 131329, 238780, 262658, 370109, 525316, 656645, 740218, 1313290, 1480436, 1850545, 2626580, 3701090, 4071199, 7402180, 8142398, 16284796, 20355995, 40711990, 81423980]

約数ペア:

[(1, 81423980), (2, 40711990), (4, 20355995), (5, 16284796), (10, 8142398), (11, 7402180), (20, 4071199), (22, 3701090), (31, 2626580), (44, 1850545), (55, 1480436), (62, 1313290), (110, 740218), (124, 656645), (155, 525316), (220, 370109), (310, 262658), (341, 238780), (620, 131329), (682, 119390), (1364, 59695), (1705, 47756), (3410, 23878), (6820, 11939)]