218400780

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{280001}}^1$

素因数の和:280026

約数の個数: 48

約数和(自身を含む): 658564704

約数和(自身を除く): 440163924

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 195, 260, 390, 780, 280001, 560002, 840003, 1120004, 1400005, 1680006, 2800010, 3360012, 3640013, 4200015, 5600020, 7280026, 8400030, 10920039, 14560052, 16800060, 18200065, 21840078, 36400130, 43680156, 54600195, 72800260, 109200390, 218400780]

約数ペア:

[(1, 218400780), (2, 109200390), (3, 72800260), (4, 54600195), (5, 43680156), (6, 36400130), (10, 21840078), (12, 18200065), (13, 16800060), (15, 14560052), (20, 10920039), (26, 8400030), (30, 7280026), (39, 5600020), (52, 4200015), (60, 3640013), (65, 3360012), (78, 2800010), (130, 1680006), (156, 1400005), (195, 1120004), (260, 840003), (390, 560002), (780, 280001)]