404798720

素因数分解:

$2^8\times 5^1\times {\mathrm{229}}^1\times {\mathrm{1381}}^1$

素因数の和:1631

約数の個数: 72

約数和(自身を含む): 974558760

約数和(自身を除く): 569760040

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 229, 256, 320, 458, 640, 916, 1145, 1280, 1381, 1832, 2290, 2762, 3664, 4580, 5524, 6905, 7328, 9160, 11048, 13810, 14656, 18320, 22096, 27620, 29312, 36640, 44192, 55240, 58624, 73280, 88384, 110480, 146560, 176768, 220960, 293120, 316249, 353536, 441920, 632498, 883840, 1264996, 1581245, 1767680, 2529992, 3162490, 5059984, 6324980, 10119968, 12649960, 20239936, 25299920, 40479872, 50599840, 80959744, 101199680, 202399360, 404798720]

約数ペア:

[(1, 404798720), (2, 202399360), (4, 101199680), (5, 80959744), (8, 50599840), (10, 40479872), (16, 25299920), (20, 20239936), (32, 12649960), (40, 10119968), (64, 6324980), (80, 5059984), (128, 3162490), (160, 2529992), (229, 1767680), (256, 1581245), (320, 1264996), (458, 883840), (640, 632498), (916, 441920), (1145, 353536), (1280, 316249), (1381, 293120), (1832, 220960), (2290, 176768), (2762, 146560), (3664, 110480), (4580, 88384), (5524, 73280), (6905, 58624), (7328, 55240), (9160, 44192), (11048, 36640), (13810, 29312), (14656, 27620), (18320, 22096)]