21710540

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^2\times {\mathrm{31}}^1\times {\mathrm{97}}^1$

素因数の和:175

約数の個数: 72

約数和(自身を含む): 50182272

約数和(自身を除く): 28471732

約数列:

[1, 2, 4, 5, 10, 19, 20, 31, 38, 62, 76, 95, 97, 124, 155, 190, 194, 310, 361, 380, 388, 485, 589, 620, 722, 970, 1178, 1444, 1805, 1843, 1940, 2356, 2945, 3007, 3610, 3686, 5890, 6014, 7220, 7372, 9215, 11191, 11780, 12028, 15035, 18430, 22382, 30070, 35017, 36860, 44764, 55955, 57133, 60140, 70034, 111910, 114266, 140068, 175085, 223820, 228532, 285665, 350170, 571330, 700340, 1085527, 1142660, 2171054, 4342108, 5427635, 10855270, 21710540]

約数ペア:

[(1, 21710540), (2, 10855270), (4, 5427635), (5, 4342108), (10, 2171054), (19, 1142660), (20, 1085527), (31, 700340), (38, 571330), (62, 350170), (76, 285665), (95, 228532), (97, 223820), (124, 175085), (155, 140068), (190, 114266), (194, 111910), (310, 70034), (361, 60140), (380, 57133), (388, 55955), (485, 44764), (589, 36860), (620, 35017), (722, 30070), (970, 22382), (1178, 18430), (1444, 15035), (1805, 12028), (1843, 11780), (1940, 11191), (2356, 9215), (2945, 7372), (3007, 7220), (3610, 6014), (3686, 5890)]