81440580

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{263}}^1\times {\mathrm{397}}^1$

素因数の和:685

約数の個数: 96

約数和(自身を含む): 247129344

約数和(自身を除く): 165688764

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 195, 260, 263, 390, 397, 526, 780, 789, 794, 1052, 1191, 1315, 1578, 1588, 1985, 2382, 2630, 3156, 3419, 3945, 3970, 4764, 5161, 5260, 5955, 6838, 7890, 7940, 10257, 10322, 11910, 13676, 15483, 15780, 17095, 20514, 20644, 23820, 25805, 30966, 34190, 41028, 51285, 51610, 61932, 68380, 77415, 102570, 103220, 104411, 154830, 205140, 208822, 309660, 313233, 417644, 522055, 626466, 1044110, 1252932, 1357343, 1566165, 2088220, 2714686, 3132330, 4072029, 5429372, 6264660, 6786715, 8144058, 13573430, 16288116, 20360145, 27146860, 40720290, 81440580]

約数ペア:

[(1, 81440580), (2, 40720290), (3, 27146860), (4, 20360145), (5, 16288116), (6, 13573430), (10, 8144058), (12, 6786715), (13, 6264660), (15, 5429372), (20, 4072029), (26, 3132330), (30, 2714686), (39, 2088220), (52, 1566165), (60, 1357343), (65, 1252932), (78, 1044110), (130, 626466), (156, 522055), (195, 417644), (260, 313233), (263, 309660), (390, 208822), (397, 205140), (526, 154830), (780, 104411), (789, 103220), (794, 102570), (1052, 77415), (1191, 68380), (1315, 61932), (1578, 51610), (1588, 51285), (1985, 41028), (2382, 34190), (2630, 30966), (3156, 25805), (3419, 23820), (3945, 20644), (3970, 20514), (4764, 17095), (5161, 15780), (5260, 15483), (5955, 13676), (6838, 11910), (7890, 10322), (7940, 10257)]