81234920

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^2\times {\mathrm{61}}^1\times {\mathrm{197}}^1$

素因数の和:295

約数の個数: 96

約数和(自身を含む): 202185720

約数和(自身を除く): 120950800

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 61, 65, 104, 122, 130, 169, 197, 244, 260, 305, 338, 394, 488, 520, 610, 676, 788, 793, 845, 985, 1220, 1352, 1576, 1586, 1690, 1970, 2440, 2561, 3172, 3380, 3940, 3965, 5122, 6344, 6760, 7880, 7930, 10244, 10309, 12017, 12805, 15860, 20488, 20618, 24034, 25610, 31720, 33293, 41236, 48068, 51220, 51545, 60085, 66586, 82472, 96136, 102440, 103090, 120170, 133172, 156221, 166465, 206180, 240340, 266344, 312442, 332930, 412360, 480680, 624884, 665860, 781105, 1249768, 1331720, 1562210, 2030873, 3124420, 4061746, 6248840, 8123492, 10154365, 16246984, 20308730, 40617460, 81234920]

約数ペア:

[(1, 81234920), (2, 40617460), (4, 20308730), (5, 16246984), (8, 10154365), (10, 8123492), (13, 6248840), (20, 4061746), (26, 3124420), (40, 2030873), (52, 1562210), (61, 1331720), (65, 1249768), (104, 781105), (122, 665860), (130, 624884), (169, 480680), (197, 412360), (244, 332930), (260, 312442), (305, 266344), (338, 240340), (394, 206180), (488, 166465), (520, 156221), (610, 133172), (676, 120170), (788, 103090), (793, 102440), (845, 96136), (985, 82472), (1220, 66586), (1352, 60085), (1576, 51545), (1586, 51220), (1690, 48068), (1970, 41236), (2440, 33293), (2561, 31720), (3172, 25610), (3380, 24034), (3940, 20618), (3965, 20488), (5122, 15860), (6344, 12805), (6760, 12017), (7880, 10309), (7930, 10244)]