201920980

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{281}}^1$

素因数の和:401

約数の個数: 96

約数和(自身を含む): 469969920

約数和(自身を除く): 268048940

約数列:

[1, 2, 4, 5, 10, 19, 20, 31, 38, 61, 62, 76, 95, 122, 124, 155, 190, 244, 281, 305, 310, 380, 562, 589, 610, 620, 1124, 1159, 1178, 1220, 1405, 1891, 2318, 2356, 2810, 2945, 3782, 4636, 5339, 5620, 5795, 5890, 7564, 8711, 9455, 10678, 11590, 11780, 17141, 17422, 18910, 21356, 23180, 26695, 34282, 34844, 35929, 37820, 43555, 53390, 68564, 71858, 85705, 87110, 106780, 143716, 165509, 171410, 174220, 179645, 325679, 331018, 342820, 359290, 531371, 651358, 662036, 718580, 827545, 1062742, 1302716, 1628395, 1655090, 2125484, 2656855, 3256790, 3310180, 5313710, 6513580, 10096049, 10627420, 20192098, 40384196, 50480245, 100960490, 201920980]

約数ペア:

[(1, 201920980), (2, 100960490), (4, 50480245), (5, 40384196), (10, 20192098), (19, 10627420), (20, 10096049), (31, 6513580), (38, 5313710), (61, 3310180), (62, 3256790), (76, 2656855), (95, 2125484), (122, 1655090), (124, 1628395), (155, 1302716), (190, 1062742), (244, 827545), (281, 718580), (305, 662036), (310, 651358), (380, 531371), (562, 359290), (589, 342820), (610, 331018), (620, 325679), (1124, 179645), (1159, 174220), (1178, 171410), (1220, 165509), (1405, 143716), (1891, 106780), (2318, 87110), (2356, 85705), (2810, 71858), (2945, 68564), (3782, 53390), (4636, 43555), (5339, 37820), (5620, 35929), (5795, 34844), (5890, 34282), (7564, 26695), (8711, 23180), (9455, 21356), (10678, 18910), (11590, 17422), (11780, 17141)]