19900760

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{1459}}^1$

素因数の和:1512

約数の個数: 64

約数和(自身を含む): 50457600

約数和(自身を除く): 30556840

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 31, 40, 44, 55, 62, 88, 110, 124, 155, 220, 248, 310, 341, 440, 620, 682, 1240, 1364, 1459, 1705, 2728, 2918, 3410, 5836, 6820, 7295, 11672, 13640, 14590, 16049, 29180, 32098, 45229, 58360, 64196, 80245, 90458, 128392, 160490, 180916, 226145, 320980, 361832, 452290, 497519, 641960, 904580, 995038, 1809160, 1990076, 2487595, 3980152, 4975190, 9950380, 19900760]

約数ペア:

[(1, 19900760), (2, 9950380), (4, 4975190), (5, 3980152), (8, 2487595), (10, 1990076), (11, 1809160), (20, 995038), (22, 904580), (31, 641960), (40, 497519), (44, 452290), (55, 361832), (62, 320980), (88, 226145), (110, 180916), (124, 160490), (155, 128392), (220, 90458), (248, 80245), (310, 64196), (341, 58360), (440, 45229), (620, 32098), (682, 29180), (1240, 16049), (1364, 14590), (1459, 13640), (1705, 11672), (2728, 7295), (2918, 6820), (3410, 5836)]