21369680

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{827}}^1$

素因数の和:876

約数の個数: 80

約数和(自身を含む): 55442880

約数和(自身を除く): 34073200

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 19, 20, 34, 38, 40, 68, 76, 80, 85, 95, 136, 152, 170, 190, 272, 304, 323, 340, 380, 646, 680, 760, 827, 1292, 1360, 1520, 1615, 1654, 2584, 3230, 3308, 4135, 5168, 6460, 6616, 8270, 12920, 13232, 14059, 15713, 16540, 25840, 28118, 31426, 33080, 56236, 62852, 66160, 70295, 78565, 112472, 125704, 140590, 157130, 224944, 251408, 267121, 281180, 314260, 534242, 562360, 628520, 1068484, 1124720, 1257040, 1335605, 2136968, 2671210, 4273936, 5342420, 10684840, 21369680]

約数ペア:

[(1, 21369680), (2, 10684840), (4, 5342420), (5, 4273936), (8, 2671210), (10, 2136968), (16, 1335605), (17, 1257040), (19, 1124720), (20, 1068484), (34, 628520), (38, 562360), (40, 534242), (68, 314260), (76, 281180), (80, 267121), (85, 251408), (95, 224944), (136, 157130), (152, 140590), (170, 125704), (190, 112472), (272, 78565), (304, 70295), (323, 66160), (340, 62852), (380, 56236), (646, 33080), (680, 31426), (760, 28118), (827, 25840), (1292, 16540), (1360, 15713), (1520, 14059), (1615, 13232), (1654, 12920), (2584, 8270), (3230, 6616), (3308, 6460), (4135, 5168)]