21918208

素因数分解:

$2^9\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{89}}^1$

素因数の和:157

約数の個数: 80

約数和(自身を含む): 48981240

約数和(自身を除く): 27063032

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 37, 52, 64, 74, 89, 104, 128, 148, 178, 208, 256, 296, 356, 416, 481, 512, 592, 712, 832, 962, 1157, 1184, 1424, 1664, 1924, 2314, 2368, 2848, 3293, 3328, 3848, 4628, 4736, 5696, 6586, 6656, 7696, 9256, 9472, 11392, 13172, 15392, 18512, 18944, 22784, 26344, 30784, 37024, 42809, 45568, 52688, 61568, 74048, 85618, 105376, 123136, 148096, 171236, 210752, 246272, 296192, 342472, 421504, 592384, 684944, 843008, 1369888, 1686016, 2739776, 5479552, 10959104, 21918208]

約数ペア:

[(1, 21918208), (2, 10959104), (4, 5479552), (8, 2739776), (13, 1686016), (16, 1369888), (26, 843008), (32, 684944), (37, 592384), (52, 421504), (64, 342472), (74, 296192), (89, 246272), (104, 210752), (128, 171236), (148, 148096), (178, 123136), (208, 105376), (256, 85618), (296, 74048), (356, 61568), (416, 52688), (481, 45568), (512, 42809), (592, 37024), (712, 30784), (832, 26344), (962, 22784), (1157, 18944), (1184, 18512), (1424, 15392), (1664, 13172), (1924, 11392), (2314, 9472), (2368, 9256), (2848, 7696), (3293, 6656), (3328, 6586), (3848, 5696), (4628, 4736)]