19711900

素因数分解:

$2^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{59}}^1\times {\mathrm{257}}^1$

素因数の和:343

約数の個数: 72

約数和(自身を含む): 47028240

約数和(自身を除く): 27316340

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 50, 52, 59, 65, 100, 118, 130, 236, 257, 260, 295, 325, 514, 590, 650, 767, 1028, 1180, 1285, 1300, 1475, 1534, 2570, 2950, 3068, 3341, 3835, 5140, 5900, 6425, 6682, 7670, 12850, 13364, 15163, 15340, 16705, 19175, 25700, 30326, 33410, 38350, 60652, 66820, 75815, 76700, 83525, 151630, 167050, 197119, 303260, 334100, 379075, 394238, 758150, 788476, 985595, 1516300, 1971190, 3942380, 4927975, 9855950, 19711900]

約数ペア:

[(1, 19711900), (2, 9855950), (4, 4927975), (5, 3942380), (10, 1971190), (13, 1516300), (20, 985595), (25, 788476), (26, 758150), (50, 394238), (52, 379075), (59, 334100), (65, 303260), (100, 197119), (118, 167050), (130, 151630), (236, 83525), (257, 76700), (260, 75815), (295, 66820), (325, 60652), (514, 38350), (590, 33410), (650, 30326), (767, 25700), (1028, 19175), (1180, 16705), (1285, 15340), (1300, 15163), (1475, 13364), (1534, 12850), (2570, 7670), (2950, 6682), (3068, 6425), (3341, 5900), (3835, 5140)]