19651840

素因数分解:

$2^8\times 5^1\times {\mathrm{13}}^1\times {\mathrm{1181}}^1$

素因数の和:1215

約数の個数: 72

約数和(自身を含む): 50736168

約数和(自身を除く): 31084328

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 64, 65, 80, 104, 128, 130, 160, 208, 256, 260, 320, 416, 520, 640, 832, 1040, 1181, 1280, 1664, 2080, 2362, 3328, 4160, 4724, 5905, 8320, 9448, 11810, 15353, 16640, 18896, 23620, 30706, 37792, 47240, 61412, 75584, 76765, 94480, 122824, 151168, 153530, 188960, 245648, 302336, 307060, 377920, 491296, 614120, 755840, 982592, 1228240, 1511680, 1965184, 2456480, 3930368, 4912960, 9825920, 19651840]

約数ペア:

[(1, 19651840), (2, 9825920), (4, 4912960), (5, 3930368), (8, 2456480), (10, 1965184), (13, 1511680), (16, 1228240), (20, 982592), (26, 755840), (32, 614120), (40, 491296), (52, 377920), (64, 307060), (65, 302336), (80, 245648), (104, 188960), (128, 153530), (130, 151168), (160, 122824), (208, 94480), (256, 76765), (260, 75584), (320, 61412), (416, 47240), (520, 37792), (640, 30706), (832, 23620), (1040, 18896), (1181, 16640), (1280, 15353), (1664, 11810), (2080, 9448), (2362, 8320), (3328, 5905), (4160, 4724)]