81251840

素因数分解:

$2^9\times 5^1\times {\mathrm{17}}^1\times {\mathrm{1867}}^1$

素因数の和:1907

約数の個数: 80

約数和(自身を含む): 206384112

約数和(自身を除く): 125132272

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 64, 68, 80, 85, 128, 136, 160, 170, 256, 272, 320, 340, 512, 544, 640, 680, 1088, 1280, 1360, 1867, 2176, 2560, 2720, 3734, 4352, 5440, 7468, 8704, 9335, 10880, 14936, 18670, 21760, 29872, 31739, 37340, 43520, 59744, 63478, 74680, 119488, 126956, 149360, 158695, 238976, 253912, 298720, 317390, 477952, 507824, 597440, 634780, 955904, 1015648, 1194880, 1269560, 2031296, 2389760, 2539120, 4062592, 4779520, 5078240, 8125184, 10156480, 16250368, 20312960, 40625920, 81251840]

約数ペア:

[(1, 81251840), (2, 40625920), (4, 20312960), (5, 16250368), (8, 10156480), (10, 8125184), (16, 5078240), (17, 4779520), (20, 4062592), (32, 2539120), (34, 2389760), (40, 2031296), (64, 1269560), (68, 1194880), (80, 1015648), (85, 955904), (128, 634780), (136, 597440), (160, 507824), (170, 477952), (256, 317390), (272, 298720), (320, 253912), (340, 238976), (512, 158695), (544, 149360), (640, 126956), (680, 119488), (1088, 74680), (1280, 63478), (1360, 59744), (1867, 43520), (2176, 37340), (2560, 31739), (2720, 29872), (3734, 21760), (4352, 18670), (5440, 14936), (7468, 10880), (8704, 9335)]