19996240

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{733}}^1$

素因数の和:788

約数の個数: 80

約数和(自身を含む): 52425216

約数和(自身を除く): 32428976

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 31, 40, 44, 55, 62, 80, 88, 110, 124, 155, 176, 220, 248, 310, 341, 440, 496, 620, 682, 733, 880, 1240, 1364, 1466, 1705, 2480, 2728, 2932, 3410, 3665, 5456, 5864, 6820, 7330, 8063, 11728, 13640, 14660, 16126, 22723, 27280, 29320, 32252, 40315, 45446, 58640, 64504, 80630, 90892, 113615, 129008, 161260, 181784, 227230, 249953, 322520, 363568, 454460, 499906, 645040, 908920, 999812, 1249765, 1817840, 1999624, 2499530, 3999248, 4999060, 9998120, 19996240]

約数ペア:

[(1, 19996240), (2, 9998120), (4, 4999060), (5, 3999248), (8, 2499530), (10, 1999624), (11, 1817840), (16, 1249765), (20, 999812), (22, 908920), (31, 645040), (40, 499906), (44, 454460), (55, 363568), (62, 322520), (80, 249953), (88, 227230), (110, 181784), (124, 161260), (155, 129008), (176, 113615), (220, 90892), (248, 80630), (310, 64504), (341, 58640), (440, 45446), (496, 40315), (620, 32252), (682, 29320), (733, 27280), (880, 22723), (1240, 16126), (1364, 14660), (1466, 13640), (1705, 11728), (2480, 8063), (2728, 7330), (2932, 6820), (3410, 5864), (3665, 5456)]