19978008

素因数分解:

$2^3\times 3^1\times {\mathrm{47}}^1\times {\mathrm{89}}^1\times {\mathrm{199}}^1$

素因数の和:344

約数の個数: 64

約数和(自身を含む): 51840000

約数和(自身を除く): 31861992

約数列:

[1, 2, 3, 4, 6, 8, 12, 24, 47, 89, 94, 141, 178, 188, 199, 267, 282, 356, 376, 398, 534, 564, 597, 712, 796, 1068, 1128, 1194, 1592, 2136, 2388, 4183, 4776, 8366, 9353, 12549, 16732, 17711, 18706, 25098, 28059, 33464, 35422, 37412, 50196, 53133, 56118, 70844, 74824, 100392, 106266, 112236, 141688, 212532, 224472, 425064, 832417, 1664834, 2497251, 3329668, 4994502, 6659336, 9989004, 19978008]

約数ペア:

[(1, 19978008), (2, 9989004), (3, 6659336), (4, 4994502), (6, 3329668), (8, 2497251), (12, 1664834), (24, 832417), (47, 425064), (89, 224472), (94, 212532), (141, 141688), (178, 112236), (188, 106266), (199, 100392), (267, 74824), (282, 70844), (356, 56118), (376, 53133), (398, 50196), (534, 37412), (564, 35422), (597, 33464), (712, 28059), (796, 25098), (1068, 18706), (1128, 17711), (1194, 16732), (1592, 12549), (2136, 9353), (2388, 8366), (4183, 4776)]