21488240

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{67}}^1\times {\mathrm{211}}^1$

素因数の和:310

約数の個数: 80

約数和(自身を含む): 53627520

約数和(自身を除く): 32139280

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 67, 76, 80, 95, 134, 152, 190, 211, 268, 304, 335, 380, 422, 536, 670, 760, 844, 1055, 1072, 1273, 1340, 1520, 1688, 2110, 2546, 2680, 3376, 4009, 4220, 5092, 5360, 6365, 8018, 8440, 10184, 12730, 14137, 16036, 16880, 20045, 20368, 25460, 28274, 32072, 40090, 50920, 56548, 64144, 70685, 80180, 101840, 113096, 141370, 160360, 226192, 268603, 282740, 320720, 537206, 565480, 1074412, 1130960, 1343015, 2148824, 2686030, 4297648, 5372060, 10744120, 21488240]

約数ペア:

[(1, 21488240), (2, 10744120), (4, 5372060), (5, 4297648), (8, 2686030), (10, 2148824), (16, 1343015), (19, 1130960), (20, 1074412), (38, 565480), (40, 537206), (67, 320720), (76, 282740), (80, 268603), (95, 226192), (134, 160360), (152, 141370), (190, 113096), (211, 101840), (268, 80180), (304, 70685), (335, 64144), (380, 56548), (422, 50920), (536, 40090), (670, 32072), (760, 28274), (844, 25460), (1055, 20368), (1072, 20045), (1273, 16880), (1340, 16036), (1520, 14137), (1688, 12730), (2110, 10184), (2546, 8440), (2680, 8018), (3376, 6365), (4009, 5360), (4220, 5092)]