21441880

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{89}}^1\times {\mathrm{317}}^1$

素因数の和:436

約数の個数: 64

約数和(自身を含む): 51516000

約数和(自身を除く): 30074120

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 89, 95, 152, 178, 190, 317, 356, 380, 445, 634, 712, 760, 890, 1268, 1585, 1691, 1780, 2536, 3170, 3382, 3560, 6023, 6340, 6764, 8455, 12046, 12680, 13528, 16910, 24092, 28213, 30115, 33820, 48184, 56426, 60230, 67640, 112852, 120460, 141065, 225704, 240920, 282130, 536047, 564260, 1072094, 1128520, 2144188, 2680235, 4288376, 5360470, 10720940, 21441880]

約数ペア:

[(1, 21441880), (2, 10720940), (4, 5360470), (5, 4288376), (8, 2680235), (10, 2144188), (19, 1128520), (20, 1072094), (38, 564260), (40, 536047), (76, 282130), (89, 240920), (95, 225704), (152, 141065), (178, 120460), (190, 112852), (317, 67640), (356, 60230), (380, 56426), (445, 48184), (634, 33820), (712, 30115), (760, 28213), (890, 24092), (1268, 16910), (1585, 13528), (1691, 12680), (1780, 12046), (2536, 8455), (3170, 6764), (3382, 6340), (3560, 6023)]