28220920

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{7753}}^1$

素因数の和:7784

約数の個数: 64

約数和(自身を含む): 78160320

約数和(自身を除く): 49939400

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 20, 26, 28, 35, 40, 52, 56, 65, 70, 91, 104, 130, 140, 182, 260, 280, 364, 455, 520, 728, 910, 1820, 3640, 7753, 15506, 31012, 38765, 54271, 62024, 77530, 100789, 108542, 155060, 201578, 217084, 271355, 310120, 403156, 434168, 503945, 542710, 705523, 806312, 1007890, 1085420, 1411046, 2015780, 2170840, 2822092, 3527615, 4031560, 5644184, 7055230, 14110460, 28220920]

約数ペア:

[(1, 28220920), (2, 14110460), (4, 7055230), (5, 5644184), (7, 4031560), (8, 3527615), (10, 2822092), (13, 2170840), (14, 2015780), (20, 1411046), (26, 1085420), (28, 1007890), (35, 806312), (40, 705523), (52, 542710), (56, 503945), (65, 434168), (70, 403156), (91, 310120), (104, 271355), (130, 217084), (140, 201578), (182, 155060), (260, 108542), (280, 100789), (364, 77530), (455, 62024), (520, 54271), (728, 38765), (910, 31012), (1820, 15506), (3640, 7753)]