400860

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{131}}^1$

素因数の和:163

約数の個数: 72

約数和(自身を含む): 1297296

約数和(自身を除く): 896436

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 17, 18, 20, 30, 34, 36, 45, 51, 60, 68, 85, 90, 102, 131, 153, 170, 180, 204, 255, 262, 306, 340, 393, 510, 524, 612, 655, 765, 786, 1020, 1179, 1310, 1530, 1572, 1965, 2227, 2358, 2620, 3060, 3930, 4454, 4716, 5895, 6681, 7860, 8908, 11135, 11790, 13362, 20043, 22270, 23580, 26724, 33405, 40086, 44540, 66810, 80172, 100215, 133620, 200430, 400860]

約数ペア:

[(1, 400860), (2, 200430), (3, 133620), (4, 100215), (5, 80172), (6, 66810), (9, 44540), (10, 40086), (12, 33405), (15, 26724), (17, 23580), (18, 22270), (20, 20043), (30, 13362), (34, 11790), (36, 11135), (45, 8908), (51, 7860), (60, 6681), (68, 5895), (85, 4716), (90, 4454), (102, 3930), (131, 3060), (153, 2620), (170, 2358), (180, 2227), (204, 1965), (255, 1572), (262, 1530), (306, 1310), (340, 1179), (393, 1020), (510, 786), (524, 765), (612, 655)]