28721920

素因数分解:

$2^8\times 5^1\times {\mathrm{19}}^1\times {\mathrm{1181}}^1$

素因数の和:1221

約数の個数: 72

約数和(自身を含む): 72480240

約数和(自身を除く): 43758320

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 32, 38, 40, 64, 76, 80, 95, 128, 152, 160, 190, 256, 304, 320, 380, 608, 640, 760, 1181, 1216, 1280, 1520, 2362, 2432, 3040, 4724, 4864, 5905, 6080, 9448, 11810, 12160, 18896, 22439, 23620, 24320, 37792, 44878, 47240, 75584, 89756, 94480, 112195, 151168, 179512, 188960, 224390, 302336, 359024, 377920, 448780, 718048, 755840, 897560, 1436096, 1511680, 1795120, 2872192, 3590240, 5744384, 7180480, 14360960, 28721920]

約数ペア:

[(1, 28721920), (2, 14360960), (4, 7180480), (5, 5744384), (8, 3590240), (10, 2872192), (16, 1795120), (19, 1511680), (20, 1436096), (32, 897560), (38, 755840), (40, 718048), (64, 448780), (76, 377920), (80, 359024), (95, 302336), (128, 224390), (152, 188960), (160, 179512), (190, 151168), (256, 112195), (304, 94480), (320, 89756), (380, 75584), (608, 47240), (640, 44878), (760, 37792), (1181, 24320), (1216, 23620), (1280, 22439), (1520, 18896), (2362, 12160), (2432, 11810), (3040, 9448), (4724, 6080), (4864, 5905)]